@Override
        protected String getDescription() {
          return "CreateNamespaceProcedure";
        }
Create a new Namespace.
@param namespaceDescriptor descriptor for new Namespace
@param nonceGroup          Identifier for the source of the request, a client or process.
@param nonce               A unique identifier for this operation from the client or process
                           identified by <code>nonceGroup</code> (the source must ensure each
                           operation gets a unique id).
@return procedure id
hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java