Remove test dependency on sigs on de:user_talk:xqt

archivebot tests depend on the page 'user_talk:xqt' on many
different wikipedia sites, to verfiy it can parse a normal talk page,
in many languages.

de:user_talk:xqt occasionally has unsigned comments that cause the
archivebot tests to fail.

use user_talk:Ladsgroup on de.wp instead.

Bug: 67663
Change-Id: I73e4cc8368f286d7ff252e4ee971059b84733dea
Merge "Remove test dependency on sigs on de:user_talk:xqt"