HBASE-12403 IntegrationTestMTTR flaky due to aggressive RS restart timeout
HBASE-12399 Master startup race between metrics and RpcServer
HBASE-11763 Move TTL handling into ScanQueryMatcher
HBASE-11764 Support per cell TTLs
Revert "HBASE-11763 Move TTL handling into ScanQueryMatcher"

This reverts commit 9ab585258af8a09978e4882932181ad000938b6f.

Adjust implementation of cell TTLs to avoid changes to ColumnTrackers

Conflicts:
	hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScanQueryMatcher.java
Addressing first round of review feedback
HBASE-11775 Shell support for per cell TTLs