Fix FSUtils.createTableDescriptor()
-----------------------------------

                 Key: HBASE-4175
                 URL: https://issues.apache.org/jira/browse/HBASE-4175
             Project: HBase
          Issue Type: Bug
    Affects Versions: 0.92.0
            Reporter: Ted Yu


Currently createTableDescriptor() doesn't return anything.
The caller wouldn't know whether the descriptor is created or not. See 
exception handling:
{code}
   } catch(IOException ioe) {
     LOG.info("IOException while trying to create tableInfo in HDFS", ioe);
   }
{code}
We should return a boolean.

If the table descriptor exists already, maybe we should deserialize from hdfs 
and compare with htableDescriptor argument. If they differ, I am not sure what 
the proper action would be.

Maybe we can add a boolean argument, force, to createTableDescriptor(). When 
force is true, existing table descriptor would be overwritten.

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