Simplify LDAPUpdater

- drop unused dm_password and ldapi arguments
- remove online feature that was never implemented
- allow passing of api object that is used to populate substitution
  dictionary
- simplify substitution dictionary updates
- remove unused instances vars

Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>

install/tools/ipa-nis-manage.in

@@ -149,7 +149,7 @@ def main():
         # could be turned off, handle both cases.
         if entry is None:
             print("Enabling plugin")
-            ld = LDAPUpdate(dm_password=dirman_password, sub_dict={}, ldapi=True)
+            ld = LDAPUpdate()
             if ld.update(files) != True:
                 retval = 1
         elif entry.get('nsslapd-pluginenabled', [''])[0].lower() == 'off':