Bug 1606009 - Fix & silent some tests r=Callek

Differential Revision: https://phabricator.services.mozilla.com/D58266

--HG--
extra : moz-landing-system : lando

.yamllint

@@ -1,5 +1,6 @@
 ---
+extends: default
+
 ignore: |
   *node_modules*
-
+  *bad.yml
-extends: default