Revision 556334

HADOOP-1574 Concurrent creates of a table named 'X' all succeed
M src/contrib/hbase/src/test/org/apache/hadoop/hbase/TestTable.java
    (testTable): Add checking of actual exceptions thrown and
    assertions that we are getting right behavior.  Add a test
    that has ten clients concurrently trying to create same table.
M src/contrib/hbase/src/java/org/apache/hadoop/hbase/HClient.java
    javadoc edit. Fix debug message that could give impression
    table was found when it wasn't.
M src/contrib/hbase/src/java/org/apache/hadoop/hbase/HTableDescriptor.java
    Added comment on table nameing.
M src/contrib/hbase/src/java/org/apache/hadoop/hbase/HMaster.java
    (createTable): Refactored. Bulk moved to a private override.
    Changed how check for existance is done.
M rc/contrib/hbase/src/java/org/apache/hadoop/hbase/HRegionInfo.java
    (getTableNameFromRegionName): Utility method added.
A src/contrib/hbase/src/java/org/apache/hadoop/hbase/TableExistsException.java
    Added.