message: after import the jobManager currJob_, some test of jobMgr who calls JobManager::runJobInternal may lead to data race, so disable the background schedual thread of jobmanager in thos UT
diff: @@ -75,6 +75,9 @@ TEST_F(JobManagerTest, addJob) {
  TEST_F(JobManagerTest, AddRebuildTagIndexJob) {
  + // For preventting job schedule in JobManager
  + jobMgr->status_ = JobManager::Status::STOPPED;
  +
  std::vector<std::string> paras{"tag_index_name", "test_space"};
  JobDescription job(11, cpp2::AdminCmd::REBUILD_TAG_INDEX, paras);
  auto rc = jobMgr->addJob(job, adminClient_.get());
  @@ -85,6 +88,9 @@ TEST_F(JobManagerTest, AddRebuildTagIndexJob) {
  TEST_F(JobManagerTest, AddRebuildEdgeIndexJob) {
  + // For preventting job schedule in JobManager
  + jobMgr->status_ = JobManager::Status::STOPPED;
  +
  std::vector<std::string> paras{"edge_index_name", "test_space"};
  JobDescription job(11, cpp2::AdminCmd::REBUILD_EDGE_INDEX, paras);
  auto rc = jobMgr->addJob(job, adminClient_.get());
  @@ -94,6 +100,9 @@ TEST_F(JobManagerTest, AddRebuildEdgeIndexJob) {
  }
  TEST_F(JobManagerTest, StatisJob) {
  + // For preventting job schedule in JobManager
  + jobMgr->status_ = JobManager::Status::STOPPED;
  +
  std::vector<std::string> paras{"test_space"};
  JobDescription job(12, cpp2::AdminCmd::STATS, paras);
  auto rc = jobMgr->addJob(job, adminClient_.get());
  