Temporary disable parallel tests to shorten the tests duration

Change-Id: I39f2ca5aad0f83deac74060d9d3eca8e23fa975b
diff --git a/.travis.yml b/.travis.yml
index 3925301..7a77247 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,35 +17,15 @@
   - bundle install
 
 env:
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=compute_dpdk
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=compute_dpdk
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=compute_dvr
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=compute_dvr
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=compute_legacy
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=compute_legacy
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=compute_nonexternal_dvr
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=compute_nonexternal_dvr
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=compute_sriov
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=compute_sriov
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=control_cluster
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=control_cluster
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=control_dvr
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=control_dvr
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=control_nodvr
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=control_nodvr
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=control_single
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=control_single
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=gateway_dvr
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=gateway_dvr
-    - PLATFORM=trevorj/salty-whales:trusty SUITE=gateway_legacy
-    - PLATFORM=trevorj/salty-whales:xenial SUITE=gateway_legacy
+    - PLATFORM=trevorj/salty-whales:trusty
+    - PLATFORM=trevorj/salty-whales:xenial
 
 before_script:
   - set -o pipefail
   - make test | tail
 
 script:
-  - KITCHEN_LOCAL_YAML=.kitchen.travis.yml bundle exec kitchen test -t tests/integration
+  - test ! -e .kitchen.yml || bundle exec kitchen test -t tests/integration
 
 notifications:
   webhooks: