Fix system:repo

  * Currently, 'key' was processed only for default repos
  * Remove double-definition
  * Re-use idempotent fix

Co-Authored-By: Dennis Dmitriev <ddmitriev@mirantis.com>

Change-Id: Ic733f671b39e7b4a8d8e0a83515b6b0632c3a41b
1 file changed