Update test-vars.yml for repositories

Renamed in os_horizon role repo
Changed test-vars.yml to os_horizon-overrides.yml
Removed test-vars.yml

Change-Id: If3cf9b788fe8c20e2f2dff6fbd6cc2efba0c5efe
Partial-Bug: #1629284

tests/test-horizon-functional.yml

@@ -59,7 +59,6 @@
       delay: 10
   vars_files:
     - common/test-vars.yml
-    - test-vars.yml
 
 - name: Playbook for tempest testing of horizon
   hosts: utility_all
@@ -72,4 +71,3 @@
         {{ tempest_bin | dirname }}/run_tempest.sh --no-virtual-env --serial tempest_horizon.tests.scenario.test_dashboard_basic_ops.TestDashboardBasicOps
   vars_files:
     - common/test-vars.yml
-    - test-vars.yml

tests/test-install-horizon.yml

@@ -46,4 +46,3 @@
     - role: "os_horizon"
   vars_files:
     - common/test-vars.yml
-    - test-vars.yml

tox.ini

@@ -139,7 +139,7 @@ deps =
 commands =
     {[testenv:ansible]commands}
     ansible-playbook -i {toxinidir}/tests/inventory \
-                     -e @{toxinidir}/tests/test-vars.yml \
+                     -e @{toxinidir}/tests/os_horizon-overrides.yml \
                      {toxinidir}/tests/test.yml -vvvv
     {[testenv:func_logs]commands}