Description of problem:
'Location' field is marked as mandatory field to be selected while generating curl command using Global registration Template. Even when the 'Location' field is not specified/selected, the curl commands gets generated without any issue/error/warning. Curl command should not get generated unless 'Location' field is explicitly specified since it is a mandatory field.

Version-Release number of selected component (if applicable): Satellite 6.12

How reproducible: Always

Steps to Reproduce:
1. Navigate to Satellite WebUI -> Hosts -> Content Hosts -> Register Content Hosts.
2. Specify all the mandatory fields except Location. Do not specify the "Location" field and keep it as default which is "Not specified".
3. Click on "Generate" at the bottom.

Actual results: The curl command is generated even when Location field is Not specified.

Expected results: Location field is marked as a mandatory field with asterisk. Clicking on "Generate" button should ask to specify the "Location" field and should not generate the curl command until Location field is explicitly specified.

Additional info: While hovering to the question mark near Location field, it says: "If no location is set, the default location of the user is assumed.". If that is the scenario, then "Location" field should be by default set to the user's location and should not be set as "Not specified".