Optimize kitchen tests for Travis CI

Change-Id: I2c4e018582a596a318b30fde20694557d75ad371
diff --git a/.travis.yml b/.travis.yml
index 0f60415..22fbe08 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -54,7 +54,8 @@
   - 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: