BUG-1274 OF issue with datapath-id

- replaced Long with BigInteger in order to capture value greater then maxLong
- added unit test for that

Change-Id: I17d8b0c54c5c084d428883f33aa0972e3dd986ed
Signed-off-by: Michal Rehak <mirehak@cisco.com>
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>
Fix NPE on reading data

When reading data if a null value is returned return Optional.absent();

Change-Id: I2d6a3a8001492c8c4c50a779b2770c72a9953494
Signed-off-by: Moiz Raja <moraja@cisco.com>
Implement DataChangeListener

- Add a DataChangeReply to confirm receipt of a DataChange
- Created an AbstractUntypedActor class from which all actors extend. Currently the only thing this base
  class does is uniformly log incoming messages. Going forward will automatically register actors for DeathWatch and such.

Change-Id: Ibcc4179597023aa37b95641c0b666b3c650dc370
Signed-off-by: Moiz Raja <moraja@cisco.com>
Merge "BUG-1274 OF issue with datapath-id"
Merge "A bunch of miscellaneous services to get Distributed Data Store ready for deployment"
Merge "Fix NPE on reading data"
Merge "Implement DataChangeListener"