Bug fix: Return job count instead of task count on GetRoleSummary() call.

Updated test cases to catch this bug.
Updated getJobSummary API to return results as a set instead of a list.

Testing Done:
gradle clean build
gradle run - tested in local UI.

Bugs closed: AURORA-116

Reviewed at https://reviews.apache.org/r/17430/
Update tag-release to allow patch level increments.

Testing Done:
Manual

Reviewed at https://reviews.apache.org/r/17063/