idp: when adding an IdP allow to override IdP options

Use of 'ipa idp-add --provider' was supposed to allow override scope and
other IdP options. The defaults are provided by the IdP template and
were actually not overridden. Fix this.

Fixes: https://pagure.io/freeipa/issue/9421
Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>

ipaserver/plugins/idp.py

@@ -350,6 +350,9 @@ class idp_add(LDAPCreate):
                                 name=self.options[s].cli_name,
                                 error=_('value is missing'))
                     points[k] = template_str(v, elements)
+                elif k in elements:
+                    points[k] = elements[k]
+
             entry_attrs.update(points)
 
     def get_options(self):