- gpcheckcat should return a return code of 0 if schemas are found/dropped
- Backfilled tests for leaked schema logging
- Also cleaned up typo in Makefile

- print out all information about violated indexes in the logs
- changes unique index check to also return the list of violated
  segments in order to support this

- more accurate function names in GPObject
- remove duplication of query strings
- make file import for test subject independent of current working
  directory
- update test names to match casing convention

- additionally, minor refactoring in gpcheckcat and unique index check

- Before this we were adding issues to the report but not actually
  setting the checkStatus variable to False

Inheriting from GpTestCase instead of unittest.TestCase gives you:
- access to a logger via self.logger
- the ability to patch methods/objects by calling apply_patches with a list of patches
- automatic teardown of patches after tests are run
- hiding unittest dependency from the actual unit tests (e.g. overriding skip() and providing run_tests() to wrap main())

Also cleaned up unit tests for the unique index violation check

- mock pg.connect instead of patching gpcheckcat global method connect()
- use a magic mock for GV.cfg since we are trusting that it has been implemented properly

- includes unit tests for gpcheckcat covering everything after
  option parsing and everything before writing to stdout/logs
- in the process of rebasing, removes the tests for dropping leaked
  schemas.  These tests will be added back in the later commit
- adds a behave integration test for this check

* drop leaked schemas before running gpcheckcat tests

  1. drop any leaked/orphaned schemas before running any of the gpcheckcat tests
  2. add unit and behave tests
  3. move gpcheckcat from gpMgmt/bin/lib to gpMgmt/bin
  4. misc refactoring

orphan/leaked schemas are temp schemas that are not associated with any session id.
There used to be a check for leaked temp schemas in gpcheckcat
which ended up creating a repair script.

* drop the database at the end of the behave test

* move the gpcheckcat bin to lib symlink before the copy to /Users/nikhilkak/git/gpdb/gpAux/greenplum-db-devel

* fix the if check before symlinking  gpcheckcat from bin to lib

closes #595