Fix to return latest resource metadata

Addresses the latest resource metadata not being returned in
the MongoDB, SQLAlchemy, DB2, and HBase drivers. A schema
change was required for HBase, because it was overwriting
historical metadata.

Closes-Bug: #1208547
Related-Bug: #1201701
Implements: blueprint hbase-meter-table-enhancement
Change-Id: Ib09e21cbc7bbd45a6ecc321403e9947df837e14b