Fixed the path to core.py in client extensions dev guide
Merge pull request #497 from pulp/jcline-doc-typo-fix

Fixed the path to core.py in client extensions dev guide
878234 - use correct method on coordinator.
Merge pull request #498 from pulp/jortel-878234

878234 - use correct method on coordinator.
913670 - fix consumer group bind/unbind.
Merge pull request #499 from pulp/jortel-913670

913670 - fix consumer group bind/unbind.
Merge branch 'pulp-2.1'