BS-9327 - Replace integration test QuartzSchedulerExecutorITest.testCannotDeleteAGroupOfJobsFromAnotherTenant by unit test
refactor jobService, add deleteAllJobDescriptors
add groupname to deleteJobs signature
refactor QuartzSchedulerExecutor, add groupName to getJobs signature
refactor SchedulerExecutor, add groupName in delete signature
refactor QuartzSchedulerExecutor, add triggerGroup to reschedule signature, remove sessionAccessor from QuartzSchedulerExecutor
remove unused method reschedule
clean QuartzSchedulerExecutorTest
replace all reference to tenantId by groupName in schedulerExecutor