default void createNamespace(NamespaceDescriptor descriptor) throws IOException {
    get(createNamespaceAsync(descriptor), getSyncWaitTimeout(), TimeUnit.MILLISECONDS);
  }
Create a new namespace. Blocks until namespace has been successfully created or an exception is
thrown.
@param descriptor descriptor which describes the new namespace.
@throws IOException if a remote or network exception occurs
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Admin.java