Adds Travis jobs for CentOS 6 and Ubuntu 14.04

Author: petems

.travis.yml

@@ -9,6 +9,12 @@ matrix:
     env: SUITE=centos-7-docker
     script:
       - bundle exec rake acceptance:suite_on_nodeset['centos-7-docker']
+  - rvm: '2.1'
+    sudo: required
+    services: docker
+    env: SUITE=centos-7-docker
+    script:
+      - bundle exec rake acceptance:suite_on_nodeset['centos-6-docker']
   - rvm: '2.1'
     sudo: required
     services: docker
@@ -21,3 +27,9 @@ matrix:
     env: SUITE=ubuntu-1604-docker
     script:
       - bundle exec rake acceptance:suite_on_nodeset['ubuntu-1604-docker']
+  - rvm: '2.1'
+    sudo: required
+    services: docker
+    env: SUITE=ubuntu-1404-docker
+    script:
+      - bundle exec rake acceptance:suite_on_nodeset['ubuntu-1404-docker']