Assert ara database is loaded from ansible venv

This adds some code coverage on zuul-executor side, to confirm ara
database is also created by zuul-executor.

Change-Id: I53cb3f96bf550bae2c736b1116ff2266056e926b
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

tests/fixtures/config/ara-in-path/git/common-config/playbooks/ara.yaml

@@ -2,3 +2,14 @@
   tasks:
     - name: Run ara
       shell: ara --help
+
+    # NOTE(pabelanger): Validate zuul executor actually loaded ARA.
+    - name: Check that the ARA database exists
+      stat:
+        path: "{{ zuul.executor.work_root }}/.ara/ansible.sqlite"
+      register: ara_db
+
+    - name: Assert ansible.sqlite file
+      assert:
+        that:
+          - ara_db.stat.exists