Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1620094

Description of problem:
It is possible to associate certain VM from a CR by going to VMS, opening VM details and clicking 'Associate VM'. However, clicking 'Associate VMs' on a VM list doesn't associate anything and says 'No VMs matched any host.' even when there is a matching Foreman host.

Version-Release number of selected component (if applicable):
Tested with Sat 6.4 snap 18 with RHEV CR.

How reproducible:
Deterministic

Steps to Reproduce:
1. Have a VM on CR
2. Create a Host in Foreman with MAC == VM_mac
3. Infrastructure -> Compute Resources -> <CR> -> Virtual Machines -> Associate VMs
4. "No VMs matched any host." green pop-up
5. Open the VM and click 'Associate VM', it gets associated

Actual results:
VM only gets associated when attempting to associate that certain VM as opposed to trying all the VMs

Expected results:
The VM should have been associated at step 3

Additional info:
In /usr/share/foreman/app/services/compute_resource_host_associator.rb , line 13, compute_resource.vms(:eager_loading => true) returns []