Description of problem:

Currently, the finish script is deployed from Satellite server by directly ssh
into the host. However, in some network setup, Satellite server can't talk to the host but only Capsule does.

Version-Release number of selected component (if applicable):

6.4

How reproducible:

Normal

Steps to Reproduce:
1. create a subnet with am external DHCP capsule assigned. Only the capsule can talk to the DHCP.
2. provision a KVM host with an RHEL7 qcwo2 image.

Actual results:

The host is on pending installation forever because the finish script can't be deployed to the new host due to the above network setup.

Expected results:

The finish script can be deployed to the host with a remote execution job. In this case, we can get around this issue by asking the capsule to talk to the host instead of Satellite server.