void clearRegistrations() {
      LOG.debug("Clearing registrations");
      responseMappingLock.writeLock().lock();
      try {
        responseMapping.clear();
        regexSet.clear();
      } finally {
        responseMappingLock.writeLock().unlock();
      }
    }
Retrieve the service URI for this service.
hbase-it/src/test/java/org/apache/hadoop/hbase/MockHttpApiRule.java