ASGARD-1066-APP-GROUPS group applications by app group & add support for tags
tuning code style for codenarc
appeasing the codenarc again
updates from code review

> Adding JavaDoc to GroupedAppRegistrationSet
> renaming "parseTags" to "normalizeTagDelimiter" in ApplicationController
Merge pull request #477 from danveloper/ASGARD-1066-APP-GROUPS

ASGARD-1066 group applications by app group & add support for tags