GraphBackendDiscoveryService as it relates to the graph directly.  The
code was inactive but remains commented as a reminder for future work.

org.apache.hadoop.metadata.discovery.GraphBackedDiscoveryService.  Will
need additional clean up, but the functionality remains the same.

Adds Apache License Headers, enables rat-check, find-bugs and checkstyle plugins. Contributed by Venkatesh Seetharam

viewing of the output format.  

some additional logging.  Added a requestId element to the returned
JSON.

text search as before, the other accepts a GUID and will walk the graph
using the Edges specified in the query.  API call samples are in
MetadataDiscoveryResource.java.

Rigged BridgeManager and Bridge Properties together.

Guice module-loading annotation

search code committed last night.

Fixed LineageBean & LineageBridge.

Conflicts:
	metadata-bridge-parent/metadata-bridge-core/src/main/java/org/apache/hadoop/metadata/bridge/hivelineage/HiveLineageBridge.java

Replaced BridgeManager
Designed EnitityBeans

service is now loaded correctly.

Fix Hive Importer to work with Graph repository and needed refactoring.   Also fix enum handling in the repository

Added columns into table and partition classes as there are no back references to table/partition from column classes