public void start() throws IOException {
    LOG.info("Namespace State Manager started.");
    initialize();
  }
Starts the NamespaceStateManager. The boot strap of cache is done in the post master start hook
of the NamespaceAuditor class.
@throws IOException Signals that an I/O exception has occurred.
hbase-server/src/main/java/org/apache/hadoop/hbase/namespace/NamespaceStateManager.java