solve group inefficience
added LdapObject::deleteValues method, in Group object using delete method instead of set to remove members
updated ChangeLog
restored virt changelog
upd changelog, remove development comment
typo fix changelog
replicated changes from users module: LDAP object and group object
delete unused method
Merge branch 'jag/users-group-members-perfomance'

Conflicts:
	main/users/ChangeLog