[HBASE-9826] [0.89-fb] Verify KV's before/after serialization

Author: aaiyer

Summary: Verify KV's before/after serialization

Test Plan: Push to shadow

Reviewers: mbm, rshroff, manukranthk, gauravm, adela

Reviewed By: manukranthk

CC: hbase-eng@, san

Differential Revision: https://phabricator.fb.com/D1022143

Task ID: 3057537

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.89-fb@1535094 13f79535-47bb-0310-9956-ffa450edef68