always gather facts in build-test-packages

Ensure that facts are gathered so that
the user and user_dir settings are correct
and not using root.

Closes-Bug: #1895138
Change-Id: I3b44c75ca42579fdaca7559b0991aed9a24eda4f

roles/build-test-packages/tasks/main.yml

@@ -3,13 +3,13 @@
 # needed to avoid potential failure when role is used without gather
 - name: gather facts used by role
   setup:
-    gather_subset: "!min,user_dir,python,processor,pkg_mgr,distribution"
-  when: >
-    ansible_user_dir is not defined or
-    ansible_python is not defined or
-    ansible_processor_vcpus is not defined or
-    ansible_pkg_mgr is not defined or
-    ansible_distribution is not defined
+    gather_subset:
+      - '!min'
+      - user_dir
+      - python
+      - processor
+      - pkg_mgr
+      - distribution
 
 - name: set python_cmd
   set_fact: