[HBASE-8185] Port the morse fix to trunk.

Author: manukranthk

Summary: Disabling the MVCC while doing a client side scan by passing the appropriate boolean. Fixed on the morse installation : https://phabricator.fb.com/D979753.

Test Plan: Tested on Morse. Observed that this prevents the code taking the MVCC code path.

Reviewers: aaiyer, rshroff, liyintang

Reviewed By: liyintang

CC: hbase-eng@, san

Differential Revision: https://phabricator.fb.com/D1014416

Task ID: 2966841

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.89-fb@1539104 13f79535-47bb-0310-9956-ffa450edef68
[HBASE-9891] Add more counters to HTableMultiplexer

Author: gauravm

Summary: Adding the number of succeeded puts and retries in HTableMultiplexer.

Test Plan: Unit Test

Reviewers: liyintang, aaiyer, manukranthk, rshroff, adela, fan

Reviewed By: liyintang

CC: hbase-eng@

Differential Revision: https://phabricator.fb.com/D1041574

Task ID: 3081647

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.89-fb@1539105 13f79535-47bb-0310-9956-ffa450edef68