Merge branch 'issue-imporve-ldap-group-link-error-msg' into 'master'

Issue imporve ldap group link error msg

I've improved the flash message with the exact error.

See merge request !168

app/controllers/groups/ldap_group_links_controller.rb

@@ -16,7 +16,7 @@ class Groups::LdapGroupLinksController < ApplicationController
         redirect_to :back, notice: 'New LDAP link saved'
       end
     else
-      redirect_to :back, alert: 'Could not create new LDAP link'
+      redirect_to :back, alert: "Could not create new LDAP link: #{ldap_group_link.error.full_messages * ', '}"
     end
   end