Update notes for submitted changes

* Run pylint when building a RPM
* pylint: suppress some additional pylint false positives
* pylint: fix minor errors identified by pylint
* pylint: decorate SQL expression hybrid methods with @classmethod
* pylint: rename importer mix-in classes to have Mixin in their name
* pylint: qpid support was removed from client and LC in commit 27b6f19a
* pylint: _parse_response method does not exist in Python 2.7
* pylint: convert mix-in to helper functions in test_schema.py
* pylint: subtask watching was "temporarily" disabled in commit 5eee47b1f
* also run Common and LabController unit tests during build
* tests: greenlet failures were not being reported in test_async
* tests: reduce subprocess count to 600 in test_reaper_race