Clean up role tests

Now that we're using the general templates, we can slim down
the role test definitions. We can also remove tests which are
not being watched, or which are fundamentally broken. With
this we can also remove unused scripts/plays.

We do the following:

1. We remove the 'ssl' tox target, as it is unused.

Change-Id: Iea2a87d60566eb7e5f1ffdd48da133a88f57d379

tox.ini

@@ -90,14 +90,6 @@ commands =
     bash -c "{toxinidir}/tests/common/test-ansible-functional.sh"
 
 
-[testenv:ssl]
-setenv =
-    {[testenv]setenv}
-    ANSIBLE_PARAMETERS=-vvv -e galera_use_ssl=True
-commands =
-    bash -c "{toxinidir}/tests/common/test-ansible-functional.sh"
-
-
 [testenv:linters]
 deps =
     -r{toxinidir}/doc/requirements.txt