Fixes Ansible Tower Service Catalog new item creation

Checks for required Provider and Job Template selections in the drop downs

https://bugzilla.redhat.com/show_bug.cgi?id=1491772

app/controllers/catalog_controller.rb

@@ -887,6 +887,13 @@ def atomic_req_submit
     if @edit[:new][:st_prov_type] == 'generic' && @edit[:new][:generic_subtype].blank?
       add_flash(_('Subtype is required.'), :error)
     end
+    # ensureProvider is selected, required field
+    if !@edit[:new][:manager_id].present?
+      add_flash(_("Provider is required, please select one from the list"), :error)
+    else
+      # ensure Job Template is selectied, required field
+      add_flash(_("Job Template is required, please select one from the list"), :error) if !@edit[:new][:template_id].present?
+    end
     add_flash(_("Provisioning Entry Point is required"), :error) if @edit[:new][:fqname].blank?
 
     # Check for a Dialog if Display in Catalog is selected