Use `modifyTimestamp` and Django counterpart for syncing
read_model_from_ldap
has a, currently unused, force
option. If it's False
the object should only be synced, if the LDAP one is newer than the Django object.
read_model_from_ldap
has a, currently unused, force
option. If it's False
the object should only be synced, if the LDAP one is newer than the Django object.