Enable to add a new Group after first unsuccessful adding

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1523214

Enable to add a new Group after first unsuccessful adding of the Group
because of missing Name, in Administrator > Configuration, Access Control
tab > Groups.

app/controllers/ops_controller/ops_rbac.rb

@@ -726,7 +726,7 @@ def rbac_edit_save_or_add(what, rbac_suffix = what)
     when :group then
       record = @edit[:group_id] ? MiqGroup.find_by(:id => @edit[:group_id]) : MiqGroup.new
       validated = rbac_group_validate?
-      rbac_group_set_record_vars(record)
+      rbac_group_set_record_vars(record) if validated
     when :role  then
       record = @edit[:role_id] ? MiqUserRole.find_by(:id => @edit[:role_id]) : MiqUserRole.new
       validated = rbac_role_validate?
@@ -1421,6 +1421,7 @@ def rbac_role_validate?
 
   # Validate some of the role fields
   def rbac_group_validate?
+    return false if @edit[:new][:description].nil?
     @assigned_filters = [] if @edit[:new][:filters].empty? || @edit[:new][:use_filter_expression]
     @filter_expression = [] if @edit[:new][:filter_expression].empty? || @edit[:new][:use_filter_expression] == false
     if @edit[:new][:role].nil? || @edit[:new][:role] == ""