fix timerEntity.getRepeat() in TimerJobEntityManagerImpl may return null, which causes a NullPointerException when calling split()

[panshaobin]

fix(flowable-job):timerEntity.getRepeat() in TimerJobEntityManagerImpl may return null, which causes a NullPointerException when calling split()

[filiphr]

Thanks for the PR @panshaobin. Can you please add a test case for this? I do not think that this can ever happen since at this point the timerEntity.getRepeat() will not be null, because this gets called from:

flowable-engine/modules/flowable-job-service/src/main/java/org/flowable/job/service/impl/asyncexecutor/TimerJobSchedulerImpl.java

Lines 41 to 42 in 36b4bc4

	if (timerJob.getRepeat() != null) {
	TimerJobEntityManager timerJobEntityManager = jobServiceConfiguration.getTimerJobEntityManager();