Revert "Upgrade to 4.12 Junit and update tests by removing @Category (Samarth Jain)"

This reverts commit 0398178617cb2aeac3661510395635b9d00f814d.
PHOENIX-1467 Upgrade to 4.12 Junit and update tests by removing @Category annotation (Samarth Jain)
PHOENIX-1474 NPE when RVC between combined with key part comparison
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/phoenix
PHOENIX-1408 Don't disable table before modifying HTable metadata (Samarth Jain)
PHOENIX-1473 Connecting with Phoenix client when Phoenix is not deployed on region server(s) takes down region server(s)
PHOENIX-1408 Don't disable table before modifying HTable metadata