ModulesConstraints tests all values of a multi-valued attributes

ModulesConstraints tests all values of a multi-valued attributes. Thus the following now works:

	ModulesConstraints = {
		Mail = {
			memberOf = "cn=aclSogoMail,ou=Groups,dc=example,dc=com";
		};
		Calendar = {
			memberOf = "cn=aclSogoCalendar,ou=Groups,dc=example,dc=com";
		};
	};