copr-be-dev-aws: test ansible PG plugin #4

Seems like become doesn't work.

Relates https://pagure.io/fedora-infrastructure/issue/8675

playbooks/groups/copr-backend.yml

@@ -3,16 +3,17 @@
   user: root
   gather_facts: True
   
+  vars_files:
+   - /srv/web/infra/ansible/vars/global.yml
+   - /srv/private/ansible/vars.yml
+   - /srv/web/infra/ansible/vars/fedora-cloud.yml
+   - /srv/private/ansible/files/openstack/passwords.yml
+
   tasks:
   - name: touch something in homedir
     shell: touch ~/test.touch
     become: yes
-    become_user: praiskup
+    become_user: postgres
-
-  - name: Create db
-    postgresql_db: name="coprdb" encoding='UTF-8'
-    become: yes
-    become_user: praiskup
 
 - name: check/create instance
   hosts: copr_back_dev:copr_back_stg:copr_back:copr_back_dev_aws:copr_back_aws