@Override
      public boolean accept(NotificationEvent event) {
        return event.getEventType().equals(HCatConstants.HCAT_CREATE_DATABASE_EVENT);
      }
This can't use TestHCatClient because it has to have control over certain conf variables when
the metastore is started.  Plus, we don't need a metastore running in another thread.  The
local one is fine.
itests/hcatalog-unit/src/test/java/org/apache/hive/hcatalog/api/TestHCatClientNotification.java