proper groupby tests
1) Make tests pass
proper groupby tests
1) Make tests pass
Merge branch 'groupby-tests' of github.com:metamx/druid into groupby-tests

Conflicts:
	common/src/main/java/com/metamx/druid/input/MapBasedRow.java
Merge pull request #62 from metamx/groupby-tests

Actual groupby tests (tests fail because of group by bug)