Description of problem:

• Host was not found by the subscription UUID: 'xxxxxxx-xxx-xxxx-xxxx-xxxxxxx', this can happen if the host is registered already, but not to this instance.

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

How reproducible:
Easily

Steps to Reproduce:
1. Register host to different location and then unregister. Check registration status:

1. subscription-manager clean
   All local data removed
2. subscription-manager unregister
   This system is currently not registered.
3. subscription-manager identity
   This system is not yet registered. Try 'subscription-manager register --help' for more information.

2. Now register host using user which have access only to another location:

1. curl -sS --insecure 'https://satellite.example.com/register?activation_keys=ak1&location_id=3&organization_id=1&update_packages=false' -H 'Authorization: Bearer eyJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjo1LCJpYXQiOjE3MDM0Nzk5ODQsImp0aSI6IjkyNTc3YTVjMTMzNTFiMGUzNjAxMjFiMWI5YThhNjJiOGE2YTk0ZmM4OGFmNDM1MzkxNDBlYzEwM2VjMjJhZTEiLCJleHAiOjE3MDM0OTQzODQsInNjb3BlIjoicmVnaXN0cmF0aW9uI2dsb2JhbCByZWdpc3RyYXRpb24jaG9zdCJ9.JpM_imwit0kPHmcIayhbIy2kARlSDgcM6HKP3eo1d5s' | bash
   #
2. Running registration
   #
   The system has been registered with ID: xxxxx-xxxxxx-xxx-xxxx-xxxxx
   The registered system name is: host.example.com
   ERROR: not_found
   Host was not found by the subscription UUID: 'xxxxxxx-xxx-xxxx-xxxx-xxxxxxx', this can happen if the host is registered already, but not to this instance

Actual results:

• Host registered but error "Host was not found by the subscription UUID" is misleading:
  ~~~

1. subscription-manager identity
   system identity: xxxxx-xxxxxx-xxx-xxxx-xxxxx
   name: host.example.com
   org name: RedHat
   org ID: RedHat
   environment name: Library
   ~~~

Expected results:

• Error "Host was not found by the subscription UUID" should not be there in command output if host is getting registered successfully.

Additional info: