Fixes #5837: Add event log for compliance mode and heart period

Conflicts:
	rudder-core/src/main/scala/com/normation/rudder/domain/eventlog/EventLogCategories.scala
	rudder-web/src/main/resources/eventLogTypeNames.properties
Merge pull request #732 from VinceMacBuche/bug_5837/eventlogs_to_track_global_hearbeat_change_is_missing

Fixes #5837: Add event log for compliance mode and heart period