Revert "Revert "HBASE-18266 Create static empty byte array to save memory (Ben Epstein)"" ... i.e. a reapply but with correct JIRA this time. This reverts commit 3a0db474a20fc6ee212db6d99d9503b6397c2fa8.
Revert "Revert "HBASE-18266 Create static empty byte array to save memory (Ben Epstein)"" ... i.e. a reapply but with correct JIRA this time. This reverts commit 3a0db474a20fc6ee212db6d99d9503b6397c2fa8.