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