Don't install system tempest with devstack

Change-Id: I01f2d18b9bd1afc1ad21c8311a355f2352a97539
diff --git a/playbooks/legacy/telemetry-dsvm-integration-tempest-plugin/run.yaml b/playbooks/legacy/telemetry-dsvm-integration-tempest-plugin/run.yaml
index f11ce27..27d919f 100644
--- a/playbooks/legacy/telemetry-dsvm-integration-tempest-plugin/run.yaml
+++ b/playbooks/legacy/telemetry-dsvm-integration-tempest-plugin/run.yaml
@@ -40,12 +40,12 @@
           export DEVSTACK_LOCAL_CONFIG+=$'\n'"enable_plugin ceilometer git://git.openstack.org/openstack/ceilometer"
           export DEVSTACK_LOCAL_CONFIG+=$'\n'"enable_plugin aodh git://git.openstack.org/openstack/aodh"
           export DEVSTACK_LOCAL_CONFIG+=$'\n'"enable_plugin heat git://git.openstack.org/openstack/heat"
-          export DEVSTACK_LOCAL_CONFIG+=$'\n'"TEMPEST_PLUGINS+=' /opt/stack/new/heat-tempest-plugin /opt/stack/new/telemetry-tempest-plugin'"
+          export DEVSTACK_LOCAL_CONFIG+=$'\n'"INSTALL_TEMPEST='False'"
           export DEVSTACK_LOCAL_CONFIG+=$'\n'"CEILOMETER_BACKEND=gnocchi"
           export DEVSTACK_LOCAL_CONFIG+=$'\n'"GNOCCHI_ARCHIVE_POLICY=high"
           export DEVSTACK_LOCAL_CONFIG+=$'\n'"CEILOMETER_PIPELINE_INTERVAL=15"
           function post_test_hook {
-              cd /opt/stack/new/telemetry-tempest-plugin/telemetry_tempest_plugin/integration/hooks/
+              cd /opt/stack/new/telemetry-tempest-plugin/playbooks/legacy/telemetry-dsvm-integration-tempest-plugin/
               ./post_test_hook.sh
           }
           export -f post_test_hook