add linter

Author: paulfantom

.travis.yml

@@ -1,14 +1,16 @@
-#sudo: required
+---
+# sudo: required
 language: python
 cache: pip
 before_install:
   - sudo apt-get -qq update
   - sudo apt-get install -y golang sshpass
 install:
-  - pip install ansible jmespath git-lfs ara
+  - pip install ansible jmespath git-lfs ara ansible-lint
 script:
   - ansible-galaxy install -r roles/requirements.yml
   - ansible-playbook --syntax-check site.yml
+  - ansible-lint site.yml || echo "Linting problems found"
 deploy:
   provider: script
   skip_cleanup: true