BUGFIX-xxxx GroupDocumentSource_test.js had a broken test case and needed a few more requires(...) to cover
expressions used in pipelines.
EAGLESIX-xxxx it is best to save work before pushing changes.
Merge pull request #150 from RiveraGroup/bugfix/mongo_2.6.5_broken_group_test

BUGFIX-xxxx GroupDocumentSource_test.js had a broken test case