[Sunstone] Updating Virtual CPU modification field as the template owner results an error #7516

Description
VM Template cannot be saved if a non-oneadmin user (template owner) had modified the Virtual CPU modification field.

To Reproduce

• Import a VM Template from the marketplace
• As a non-oneadmin user update the VM Template and change the Virtual CPU section:

1. Set Virtual CPU modification to anything (for example, list)
2. Enter some values, for example (1,2 and 4)

• Proceed to saving the template.
• Get an error [one.template.update] cannot update template. tried to change restricted attribute: user inputs

Expected behavior
Either the save action should allow this change or the field shouldn't be available at all.

Details

• Affected Component: Sunstone
• Hypervisor: N/A
• Version: 7.0.2

Additional context
Add any other context about the problem here.

Progress Status

• Code committed
• Testing - QA
• Documentation (Release notes - resolved issues, compatibility, known issues)