v5.0.0a12

[integration]

NEW: (#639) add BaseRequestHandler to NotepadHandler
NEW: (#638) add BaseRequestHandler to MonitoringHandler
NEW: (#637) add BaseRequestHandler to JobSummaryHandler
NEW: (#636) add BaseRequestHandler to JobLaunchpadHandler
NEW: (#635) add BaseRequestHandler to ComponentHistoryHandler
NEW: (#634) add BaseRequestHandler to ApplicationWizardHandler
CHANGE: (#543) Use WebHandler with DIRAC.Core.Tornado.Server.privat.BaseRequestHandler for Downtimes handler.
CHANGE: (#542) Use WebHandler with DIRAC.Core.Tornado.Server.privat.BaseRequestHandler for ActivityMonitor handler.
CHANGE: (#541) Use WebHandler with DIRAC.Core.Tornado.Server.privat.BaseRequestHandler for FileCatalog handler.