Tests: Remove super-verbosity from ansible-playbook execution

With the human-readable log plugin we effectively get verbose
logging from Ansible's execution. Having -vvvv logging on top
of that is really unnecessary.

Change-Id: Ia9e20435c2f7ad93d581a1e1067b643ad20fdc97

tox.ini

@@ -118,7 +118,7 @@ commands =
                    --force
     ansible-playbook -i {toxinidir}/tests/inventory \
                      -e "rolename={toxinidir}" \
-                     {toxinidir}/tests/test.yml -vvvv
+                     {toxinidir}/tests/test.yml
 
 
 [testenv:linters]