Ecal dqm cleanup

This PR removes 5 packages:
DQM/EcalEndcapMonitorTasks
DQM/EcalEndcapMonitorClient
DQM/EcalEndcapMonitorModule
DQM/EcalEndcapMonitorDbModule
DQM/EcalBarrelMonitorModule
and renames 3:
DQM/EcalBarrelMonitorTasks -> DQM/EcalMonitorTasks
DQM/EcalBarrelMonitorClient -> DQM/EcalMonitorClient
DQM/EcalBarrelMonitorDbModule -> DQM/EcalMonitorDbModule

It is the final step of the recent rationalization and code compactification of ECAL DQM. It has passed DQM tests 1, 2, 3, 4, 6, 7, 8, 9, 11, and 12, with 5 being skipped because it has been observed to crash with an external reason.