Fix gear virtualenv testing

Change-Id: I22fb917e5655d06e129b2cfc8d366109dc884529
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

playbooks/roles/test.gear/tasks/main.yaml

@@ -12,12 +12,12 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 ---
-- name: Register /opt/venv/gear
+- name: "Register {{ gear_pip_virtualenv }}"
   stat:
-    path: /opt/venv/gear
+    path: "{{ gear_pip_virtualenv }}"
   register: test_nodepool_pip_virtualenv_stat
 
-- name: Assert /opt/venv/gear tests
+- name: "Assert {{ gear_pip_virtualenv }} tests"
   assert:
     that:
       - test_nodepool_pip_virtualenv_stat.stat.exists