Added a way to check whether we are managing the AD schema or not
Prevent OpenChange provision if we don't have access to update the AD schema
Merge branch '3.2' into cperello/better-error-handling-in-openchange

Conflicts:
	main/samba/ChangeLog
Merge branch 'cperello/better-error-handling-in-openchange' into 3.2

Conflicts:
	main/samba/ChangeLog