HBASE-12072 Standardize retry handling for master operations

Conflicts:
	hbase-client/src/main/java/org/apache/hadoop/hbase/MetaTableAccessor.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/client/Admin.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/client/HConnection.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/client/RowTooBigException.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/client/replication/ReplicationAdmin.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/flush/MasterFlushTableProcedureManager.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestReplicasClient.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionMergeTransactionOnCluster.java