Backporting Fixes #5329: overriden reports are no more expected (merged in master)

Conflicts:
	rudder-core/src/main/scala/com/normation/rudder/services/policies/DeploymentService.scala
Merge pull request #668 from VinceMacBuche/ust_1212/implem_5832/add_dashboard

Fixes #5832: Replace Rudder Home page with a shiny dashboard
Fixes #5297: Add charts for compliance