Enable image deactivate feature which was added in kilo

Change-Id: Ia1d3d811bd57d3de16d397cfab341e8d0f17cb69
diff --git a/lib/tempest b/lib/tempest
index 059709d..95715a3 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -330,6 +330,9 @@
         iniset $TEMPEST_CONFIG image http_image $TEMPEST_HTTP_IMAGE
     fi
 
+    # Image Features
+    iniset $TEMPEST_CONFIG image-feature-enabled deactivate_image True
+
     # Auth
     TEMPEST_ALLOW_TENANT_ISOLATION=${TEMPEST_ALLOW_TENANT_ISOLATION:-$TEMPEST_HAS_ADMIN}
     iniset $TEMPEST_CONFIG auth allow_tenant_isolation ${TEMPEST_ALLOW_TENANT_ISOLATION:-True}