Bug 1029: Remove dead code: clustered-data-store

opendaylight/md-sal/clustered-data-store/ is dead code that is not being
built and hasn't for some time.  Its complicating keeping
versions up to date and verifying that they are up to date.

If in the future it needs to be revived it can be retrieved from
git.

Change-Id: Ie8365d5cb48e806a9d9a9fc0175478ef21277cbd
Signed-off-by: Ed Warnicke <eaw@cisco.com>
BUG-868: do not use InstanceIdentifier.getPath()

This simplifies the NodeMapping class significantly by using the
utility methods shipped in InstanceIdentifier itself.

Change-Id: I1bb79bd4a16da9d78c600d21f67e3ca1926a0445
Signed-off-by: Robert Varga <rovarga@cisco.com>
Merge "Bug 1029: Remove dead code: clustered-data-store"
Merge "BUG-868: do not use InstanceIdentifier.getPath()"