Set default for branch when collecting DB or files

tasks/main.yml

@@ -88,7 +88,7 @@
       with_items: '{{ drupal_settings|default([]) }}'
       loop_control:
         loop_var: drupal
-      when: siteproject is not defined or siteproject == 'no' or drupal.siteproject is not defined or (siteproject == drupal.siteproject and drupal.src.git.branch == branch)
+      when: siteproject is not defined or siteproject == 'no' or drupal.siteproject is not defined or (siteproject == drupal.siteproject and drupal.src.git.branch|default('master') == branch)
       tags:
         - collect_db_dump
         - collect_asset_archive