HBASE-12029 Use Table and RegionLocator in HTable.getRegionLocations() (Solomon Duskis)

Conflicts:
	hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestHBaseFsck.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestRegionSizeCalculator.java
HBASE-12246 Compilation with hadoop-2.3.x and 2.2.x is broken -> HBASE-12220 Add hedgedReads and hedgedReadWins metrics -- REVERT