HBASE-12038 Replace internal uses of signatures with byte[] and String tableNames to use the TableName equivalents (Solomon Duskis)

Conflicts:
	hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestTableLockManager.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestQuotaAdmin.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestQuotaTableUtil.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestQuotaThrottle.java
HBASE-12123 Failed assertion in BucketCache after 11331