Finally finish the first phase of mdpoc.

Object created in the hbase, indexed in solr and retrieved using query.
Implemented batch fetch.
Changed the query implementation. Now it fetches only id from solr and then the object should be fetched from hbase.
Implemented batch create.
Implemented update with optimistic locking.
Merge branch 'master' of github.com:victorspivak/projects

Conflicts:
	md-poc/src/main/scala/svl/metadata/poc/TestClient.scala
	md-poc/src/main/scala/svl/metadata/poc/md/database/hbase/HBaseDatabase.scala
	md-poc/src/main/scala/svl/metadata/poc/md/database/hbase/HBaseDatabaseContext.scala
	md-poc/src/main/scala/svl/metadata/poc/md/database/hbase/MdHBaseMapping.scala
	md-poc/src/main/scala/svl/metadata/poc/md/database/solr/SolrEnv.scala