- for reuse in global context

- moved build status votes fields to VerdictCategory instead of having
them as private fields in Config/GerritTrigger & mark their
getters/setters deprecated
- remove the entries for the removed status votes from jelly
gerrit-trigger config & add them in VerdictCategory list
instead (all the votes are set within VerdictCategory)
- votes are now part of the VerdictCategory list (categories) so all
deprecated methods are now searching through the list instead

- some methods are redundant (containing 'verified' name although
a simpler form already exists)
- extact default gerrit commands to static fields instead

- deprecate verified/code-review minimum vote calculation
methods
- create string based label methods for minimum voting calcs
and aggregate all categories (verified & code-review included) into
the templated command allowing them to be expanded later all together
- remove redundant test (in which the scenario was testing the min.
voting calculation for the Verified label by using its associated method
instead of testing the scenario via getBuildCompletedCommand)
- update tests to check for the newly added custom label