Description of problem:
rbovirt does not use persistent authentication for API calls to RHEV-M / oVirt.
When searching for a VM using the Search box in the list of VMs, each keystroke triggers 3 API calls none of which uses persistent authentication.
This results in each call having to authenticate, triggering login and logout events which result in a slow search on busy RHEV-Ms.

Version-Release number of selected component (if applicable):
Satellite 6.2.1
tfm-rubygem-rbovirt-0.0.37-1.el7sat

How reproducible:
Always

Steps to Reproduce:
1. Create a new RHEV compute resource on a busy, large RHEV-M instance.
2. On the web ui navigate to Infrastructure --> Compute Resources --> <rhev_compute_resource> --> Virtual Machines
3. Type three letters in the "Search:" box

Actual results:
9 API calls are issued to RHEV-M.
None of those calls use persistent authentication.
9 Login events are triggered.
9 Logout events are triggered.
The search takes up to 1 minute to complete.

Expected results:
API calls use persistent authentication.
A single login event is triggered.
Subsequent API calls are faster.
The search takes considerably less time to complete on large, busy RHEV-Ms.
The session should be reused for later calls if still valid.

Additional info:

• http://www.ovirt.org/develop/release-management/features/infra/restsessionmanagement/

• https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.6/html/REST_API_Guide/Authentication_Sessions.html

• On RHEV-M extend the httpd logging as per https://bugzilla.redhat.com/show_bug.cgi?id=1347631#c2

• Observe the time taken to complete each of the API calls (last value, in microseconds, this is from an internal reproducer and does not reflect the scale of the performance problem):

10.33.9.40 - - [22/Aug/2016:09:35:02 +0100] "GET /api/datacenters?search= HTTP/1.1" 200 407 "-" "Ruby" 1457200
10.33.9.40 - - [22/Aug/2016:09:35:02 +0100] "GET /api/datacenters?search= HTTP/1.1" 200 407 "-" "Ruby" 1768403
10.33.9.40 - - [22/Aug/2016:09:35:02 +0100] "GET /api/datacenters?search= HTTP/1.1" 200 407 "-" "Ruby" 1824992
10.33.9.40 - - [22/Aug/2016:09:35:04 +0100] "GET /api/datacenters/e7851520-4a55-4ac0-91ea-7342988fa12f HTTP/1.1" 200 395 "-" "Ruby" 1832987
10.33.9.40 - - [22/Aug/2016:09:35:04 +0100] "GET /api/datacenters/e7851520-4a55-4ac0-91ea-7342988fa12f HTTP/1.1" 200 395 "-" "Ruby" 1716310
10.33.9.40 - - [22/Aug/2016:09:35:04 +0100] "GET /api/datacenters/e7851520-4a55-4ac0-91ea-7342988fa12f HTTP/1.1" 200 395 "-" "Ruby" 2248327
10.33.9.40 - - [22/Aug/2016:09:35:05 +0100] "GET /api/vms;max=10?search=rh+datacenter%3D%22dc36%22+page+1 HTTP/1.1" 200 4029 "-" "Ruby" 1758745
10.33.9.40 - - [22/Aug/2016:09:35:06 +0100] "GET /api/vms;max=10?search=r+datacenter%3D%22dc36%22+page+1 HTTP/1.1" 200 4029 "-" "Ruby" 1799803
10.33.9.40 - - [22/Aug/2016:09:35:06 +0100] "GET /api/vms;max=10?search=rhe+datacenter%3D%22dc36%22+page+1 HTTP/1.1" 200 4029 "-" "Ruby" 1937730

• Observe the contents of engine.log after typing the three characters in the search box:

2016-08-22 09:35:03,342 INFO [org.ovirt.engine.core.bll.aaa.LoginUserCommand] (ajp-/127.0.0.1:8702-6) [] Running command: LoginUserCommand internal: false.
2016-08-22 09:35:03,457 INFO [org.ovirt.engine.core.bll.aaa.LoginUserCommand] (ajp-/127.0.0.1:8702-8) [] Running command: LoginUserCommand internal: false.
2016-08-22 09:35:03,465 INFO [org.ovirt.engine.core.bll.aaa.LogoutSessionCommand] (ajp-/127.0.0.1:8702-8) [32132a7a] Running command: LogoutSessionCommand internal: false.
2016-08-22 09:35:03,669 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-6) [] Correlation ID: null, Call Stack: null, Custom Event ID: -1, Message: User admin@internal logged in.
2016-08-22 09:35:03,674 INFO [org.ovirt.engine.core.bll.aaa.LogoutSessionCommand] (ajp-/127.0.0.1:8702-6) [79ad01ab] Running command: LogoutSessionCommand internal: false.
2016-08-22 09:35:03,867 INFO [org.ovirt.engine.core.bll.aaa.LoginUserCommand] (ajp-/127.0.0.1:8702-10) [] Running command: LoginUserCommand internal: false.
2016-08-22 09:35:03,872 INFO [org.ovirt.engine.core.bll.aaa.LogoutSessionCommand] (ajp-/127.0.0.1:8702-10) [71e539e8] Running command: LogoutSessionCommand internal: false.
2016-08-22 09:35:04,044 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-8) [32132a7a] Correlation ID: 32132a7a, Call Stack: null, Custom Event ID: -1, Message: User admin@internal logged out.
2016-08-22 09:35:04,261 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-6) [79ad01ab] Correlation ID: 79ad01ab, Call Stack: null, Custom Event ID: -1, Message: User admin@internal logged out.
2016-08-22 09:35:04,411 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-10) [71e539e8] Correlation ID: 71e539e8, Call Stack: null, Custom Event ID: -1, Message: User admin@internal logged out.
2016-08-22 09:35:05,374 INFO [org.ovirt.engine.core.bll.aaa.LoginUserCommand] (ajp-/127.0.0.1:8702-12) [] Running command: LoginUserCommand internal: false.
2016-08-22 09:35:05,381 INFO [org.ovirt.engine.core.bll.aaa.LogoutSessionCommand] (ajp-/127.0.0.1:8702-12) [288b6313] Running command: LogoutSessionCommand internal: false.
2016-08-22 09:35:05,701 INFO [org.ovirt.engine.core.bll.aaa.LoginUserCommand] (ajp-/127.0.0.1:8702-4) [] Running command: LoginUserCommand internal: false.
2016-08-22 09:35:05,709 INFO [org.ovirt.engine.core.bll.aaa.LogoutSessionCommand] (ajp-/127.0.0.1:8702-4) [73e8f64b] Running command: LogoutSessionCommand internal: false.
2016-08-22 09:35:05,902 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-12) [288b6313] Correlation ID: 288b6313, Call Stack: null, Custom Event ID: -1, Message: User admin@internal logged out.
2016-08-22 09:35:05,961 INFO [org.ovirt.engine.core.bll.aaa.LoginUserCommand] (ajp-/127.0.0.1:8702-5) [] Running command: LoginUserCommand internal: false.
2016-08-22 09:35:05,967 INFO [org.ovirt.engine.core.bll.aaa.LogoutSessionCommand] (ajp-/127.0.0.1:8702-5) [675d2db2] Running command: LogoutSessionCommand internal: false.
2016-08-22 09:35:06,002 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-4) [73e8f64b] Correlation ID: 73e8f64b, Call Stack: null, Custom Event ID: -1, Message: User admin@internal logged out.
2016-08-22 09:35:06,684 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-5) [675d2db2] Correlation ID: 675d2db2, Call Stack: null, Custom Event ID: -1, Message: User admin@internal logged out.
2016-08-22 09:35:06,836 INFO [org.ovirt.engine.core.bll.aaa.LoginUserCommand] (ajp-/127.0.0.1:8702-9) [] Running command: LoginUserCommand internal: false.
2016-08-22 09:35:06,902 INFO [org.ovirt.engine.core.bll.aaa.LogoutSessionCommand] (ajp-/127.0.0.1:8702-9) [3c7c35bc] Running command: LogoutSessionCommand internal: false.
2016-08-22 09:35:07,277 INFO [org.ovirt.engine.core.bll.aaa.LoginUserCommand] (ajp-/127.0.0.1:8702-15) [] Running command: LoginUserCommand internal: false.
2016-08-22 09:35:07,341 INFO [org.ovirt.engine.core.bll.aaa.LogoutSessionCommand] (ajp-/127.0.0.1:8702-15) [5abe6c2b] Running command: LogoutSessionCommand internal: false.
2016-08-22 09:35:07,686 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-9) [3c7c35bc] Correlation ID: 3c7c35bc, Call Stack: null, Custom Event ID: -1, Message: User admin@internal logged out.
2016-08-22 09:35:07,752 INFO [org.ovirt.engine.core.bll.aaa.LoginUserCommand] (ajp-/127.0.0.1:8702-8) [] Running command: LoginUserCommand internal: false.
2016-08-22 09:35:07,817 INFO [org.ovirt.engine.core.bll.aaa.LogoutSessionCommand] (ajp-/127.0.0.1:8702-8) [73895b23] Running command: LogoutSessionCommand internal: false.
2016-08-22 09:35:07,828 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-15) [5abe6c2b] Correlation ID: 5abe6c2b, Call Stack: null, Custom Event ID: -1, Message: User admin@internal logged out.
2016-08-22 09:35:08,646 INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-8) [73895b23] Correlation ID: 73895b23, Call Stack: null, Custom Event ID: -1, Message: User admin@internal logged out.

• By including the session cookie API calls will be able to resume the session if the session is still valid and a new authentication won't be required.