Optimize kitchen tests for Travis CI

Change-Id: I475cd8960359f211e88319016b6e4cc5ef616433
diff --git a/.travis.yml b/.travis.yml
index ac3ca4c..653f024 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,7 +27,8 @@
   - make test | tail
 
 script:
-  - KITCHEN_LOCAL_YAML=.kitchen.travis.yml bundle exec kitchen test -t tests/integration
+  - test ! -e .kitchen.yml || bundle exec kitchen converge ${SUITE} || true
+  - test ! -e .kitchen.yml || bundle exec kitchen verify ${SUITE} -t tests/integration
 
 notifications:
   webhooks: