Code ReOrganization and Re-Architecture changes
1. Split OVSDB library from plugin
2. Removed all Opendaylight dependencies from OVSDB library
3. Modified the library to take in context vars to retain consistency with the current design.
4. Changed the artifact-id of all the bundles from random conventions to a consistent convention "ovsdb_*"
5. Also changed the directory structure to fit in the reorg/rearch.

Change-Id: Iea0bc8b24c398f0de861a64ddceafe49593aefdb
Signed-off-by: Madhu Venugopal <mavenugo@gmail.com>