hbase metaquery support

- move HBase configuration comment to docs

- store metadata in resource table with prefix "r_"

- get_resources and get_meters, get_samples support metaquery

- enable api v1 metaquery tests

Change-Id: I3285bb420283c2385e6f340ff30e951d58dcb450
Implements: blueprint hbase-metadata-query
Fixes: bug #1146655
Merge "hbase metaquery support"