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

broken out properly

instead of prop file.

Fixed hive model: StorageDescription is now a class, removed creating a duplicate storagedesc per partition (need to fix handling of partitions that can diverge).
  Made mem repository test work again.
Validated changes with TPCDS.  Fixed empty array handling in Graph repo

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

Guice module-loading annotation

service is now loaded correctly.

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

they are not services and made more sense with simpler, shorter names

ServiceInitializer and Services collection no longer exist and have been
replaced by Guice dependency injection.
Added comments and improved testability.
Maven verify now runs - almost ready for CI (issues with keytool maven
plugin)

properties file

with integration tests (specifically the metadata.keystore file &
keystore plugin), but int tests are otherwise loading Guice
dependency-injected instances correctly.

file (indexer.properties).