Description of problem:

After upgrading from Satellite 6.16 to 6.17, PXE-based discovery with auto-provisioning no longer works as expected.
The issue revolves as a 404 "Requested URL was not found" error when the discovered host attempts to register facts with the external Capsule.

How reproducible:

100%

Is this issue a regression from an earlier version:

Yes.

Steps to Reproduce:

With version 6.16, I could do the following workflow:

• client pxe boot to capsule
• get grub menu for fdi and boot into fdi
• allow discovery to work with no interaction
• facts registered and status success with kexec and reboot into build

With version 6.17, the same workflow has different results:

• client pxe boot to capsule
• get grub menu for fdi and boot into fdi
• allow discovery to work with no interaction
• failure occurs with a 404 error 

The interesting thing is that if we slightly change the workflow without any

modifications, it's successful:

• client pxe boot to capsule
• get grub menu for fdi and boot into fdi
• interrupt discovery
• select 'Discover with DHCP' and hit enter
• select nic and hit enter
• at credentials screen, highlight next and hit enter
• custom facts screen, select confirm and hit enter

Another slightly modified workflow without any modifications that's successful is to:

• client pxe boot to capsule
• get grub menu for fdi and boot into fdi
• interrupt discovery
• select 'Manual Network Setup'
• select nic and hit enter
• hightlight next and hit enter
• credentials screen, hightlight next and hit enter
• custom facts screen, select confirm and hit enter

Actual behavior:
PXE Discovery Auto-Provisioning with External casule fails with 404 Error

Expected behavior:
PXE Discovery Auto-Provisioning with External casule should work as expected.

Business Impact / Additional info:

QE Tracker for https://issues.redhat.com/browse/SAT-36542