void processFindCoordinatorResponseMessage(FindCoordinatorResponse<ID> resp) {
    if (isStopping) {
      return;
    }

    synchronized (searchState.responses) {
      searchState.responses.add(resp);
      if (searchState.responsesExpected <= searchState.responses.size()) {
        searchState.responses.notifyAll();
      }
    }
    setCoordinatorPublicKey(resp);
  }
for testing purpose

@param jrm the join response message to process
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/membership/GMSJoinLeave.java