A bunch of miscellaneous services to get Distributed Data Store ready for deployment

- Shard can work with both Persistent and NonPersistent messages which change the state of the InMemoryDataStore
- OSGi related changes so that the DistributedDataStore can load properly in the controller
- Other changes so that there are no startup errors (like creating a single actor system)

Change-Id: Ic9b211e2007002fa800b980e8c94463241e36b59
Signed-off-by: Moiz Raja <moraja@cisco.com>
Merge "A bunch of miscellaneous services to get Distributed Data Store ready for deployment"