Bug 5202: QA follow-up 2 - fix overeager error message

Bug 5202: QA follow-up 2 - fix overeager error message

When rebasing the patch for this, I accidentally moved the line
setting the mergereference when merging from breeding to *before*
I checked whether we were merging from breeding. Needless to say,
this caused problems. This patch fixes that, and:
* Makes the error translatable.
* Adds a missing authtypesloop argument for the template.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>