Revision 569589

HADOOP-1780 Regions are still being doubly assigned

M src/contrib/hbase/src/java/org/apache/hadoop/hbase/HStore.java
    Fix outputing fail message on each compaction though there was none.
M  src/contrib/hbase/src/java/org/apache/hadoop/hbase/HStoreFile.java
    (rename): Refactor so return only happens on end..
M  src/contrib/hbase/src/java/org/apache/hadoop/hbase/HMaster.java
    (assignRegions): Make synchronized.  In presence of concurrent visits
    by regionservers, both visiting threads could grab same set of regions
    for assignment.