Molecule tests for certificates role

Issue-ID: OOM-1762

Change-Id: Ic13d7ec775a52ad95fc0388e8b84ea8ab7367666
Signed-off-by: Samuli Silvius <s.silvius@partner.samsung.com>
diff --git a/ansible/infrastructure.yml b/ansible/infrastructure.yml
index e49ee91..ce4d4d7 100644
--- a/ansible/infrastructure.yml
+++ b/ansible/infrastructure.yml
@@ -28,4 +28,4 @@
         name: certificates
         tasks_from: upload_root_ca.yml
       vars:
-        certificates_local_dir: certs
+        certificates_local_dir: "{{ playbook_dir }}/certs"