Optimize kitchen tests for Travis CI

Change-Id: Id7915e06becf9216ca14cd0b88050ec2bbeabb81
diff --git a/.travis.yml b/.travis.yml
index 8e6fe8e..37c445a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,8 +17,8 @@
   - bundle install
 
 env:
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=memcached_server
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=memcached_server
+    - PLATFORM=trevorj/salty-whales:trusty SUITE=memcached-server
+    - PLATFORM=trevorj/salty-whales:xenial SUITE=memcached-server
 
 
 before_script:
@@ -26,7 +26,8 @@
   - 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: