SubscriptionManagerFCPTest.importNotifications(): Ident.
SubscriptionManagerFCPTest.importNotifications(): Rename

It only imports ObjectChangedEventNotification, not the other
Notification types. Thus, rename to
ImportObjectChangedEventNotifications()
FCPClientRefrenceImplementation.*.parseSynchronization(): Deprecate

Synchronizations are parsed as single objects nowadays, this function is
not used anymore. But it still might be useful to parse multiple objects
in the future. So:
- Rename it to parseMultiple()
- Deprecate it
- Add a TODO to recycle it.