Description of problem:
For the following VMs & Templates lifecycle operations:

1. "VM provision from a template" 
     - Create a VM named "VM name", from a template. 
2. "Publish VM to a template" 
     - On RHV provider: Create a Template named "Template Name" from a VM. 
     - On other providers: Create a Template, and then create a VM named "VM 
       Name".
3. "Clone Template" 
     - Create a VM named "VM Name" from a Template.

"VM Name"\"Template Name" validation should take place before submitting the request, meaning as part of the dialog.
It is currently done afterwards, at the Request stage.

Version-Release number of selected component (if applicable):
CFME-5.9.0.14

Additional info:
The "VM Name"\"Template Name" fields are located at the VM lifecycle dialogs, under the "Catalog" tab.