1009912 - removing pymongo dependency for consumers by using actual constants instead of importing pymongo in common/constants.py
Convert Criteria in unit tests to dicts.
Added a new test module for the pulp.server.tasks module.
Test the cancel function.
Merge pull request #629 from pulp/skarmark-1009912

1009912 - removing pymongo dependency for consumers by using actual constants instead of importing pymongo in common/constants.py
Add a unit test to assert that we can DELETE Celery tasks.
Remove a stray logging statement.
Merge branch 'rbarlow-convert_a_task' into rbarlow-distributed_tasks
Merge branch 'rbarlow-distributed_tasks' into rbarlow-create_celery_tasks
Get unit tests to pass.