remove references to a deleted queue from ReservedResource collection when a queue is deleted
updating unit test to include a scenario where multiple ReservedResource instances are referencing a deleted queue
added additional assertion to make sure that remaining ReservedResource is the right one
merging distributed-tasks branch and resolving conflicts
Merge pull request #745 from pulp/skarmark-reserved-resource-pruning

remove references to a deleted queue from ReservedResource collection when a queue is deleted