…atch correctly

…tion with Simple Parallelizer.

Refactor existing ZK based queue to accommodate new Distributed queue for RM.
Refactor and rename the existing memory allocation utilities to ZKQueueMemoryAllocationUtilities and DefaultMemoryAllocationUtilities.
Parallelizer code is changed to accommodate the memory adjustment for the operators during parallelization phase.
With this change, there are 3 different implementation of SimpleParallelizer; they are ZKQueueParallelizer, DistributedQueueParallelizer and DefaultParallelizer which will be used by ZK based RM, Distributed RM and Non RM configuration.

UUID support for DrillbitEndpoint
RMState Blobs definition, serialization and deserialization, Zookeeper client support for transactions
ZookeeperPersistentTransactional Store and RMStateBlobManager to do updates under lock
Protect running and waiting queries map in WorkerBee

…tion with Simple Parallelizer.

Integration changes with new DistributedRM queue configuration.
a) Remove the redundant NodeResource and merge the additional member functions with the NodeResources class.
b) Added new UUID logic and selection of a queue based on the memory requirement during parallelization phase.
c) Changed proto definitions to set the UUID of a drillbit.
d) Implementation of new DrillNode Wrapper over DrillbitEndpoint to fix the equality comparisions between DrillbitEndpoints.

Added stubs for QueryResourceManager exit and wait/cleanup thread
Update MemoryCalculator to use DrillNode instead of DrillbitEndpoint
Changes to support localbit resource registration to cluster state blob using DrillbitStatusListener
Support ThrottledResourceManager via ResourceManagerBuilder
Add some E2E tests and RMStateBlobs tests along with some bug fixes
Fix TestRMConfigLoad tests to handle case where ZKQueues are explicitly enabled

…tion with Simple Parallelizer.

Changes to set the memory allocation per operator in query profile.
Addressing an memory minimization logic was not considering non-buffered operators.
Handling error cases when memory requirements for buffered or non-buffered cannot be reduced.