Migrate Default Registration Channel Names for v5.3

https://bugzilla.redhat.com/show_bug.cgi?id=1102287
https://bugzilla.redhat.com/show_bug.cgi?id=1135052
Merge pull request #508 from brandondunne/migrate_default_channel_names_for_version_5_3

Migrate default channel names for version 5.3