fixes #4261, #5496 - add release version to activation key

4261-actkey-releasever - p-r comment cleaning

4261-actkey-releasever - rubocop and grunt ci fixes

4261-actkey-releasever - fixed before_filter for system registration w/o activation key

4261-actkey-releasever - p-r cleaning
Merge pull request #4025 from thomasmckay/4261-actkey-releasever

fixes #4261, #5496 - add release version to activation key
Fixes #5514 Subscription Link missing in Content Host Subscriptions