ci(travis): adds awesome_bot for linting *.md files (#234)

* ci(travis): adds awesome_bot for linting *.md files

* skip non-prereqs to linting mds

* make .travis.yml consistent

Author: juancarlostong

.travis.yml

@@ -15,18 +15,30 @@ install:
   - bundle install
 script: "bundle exec rake spec"
 before_script: "rubocop"
-addons:
-  srcclr: true
 after_success: "coveralls"
 
 # Integration tests need to run first to reset the PR build status to pending
 stages:
+  - 'Lint markdown files'
   - 'Integration tests'
   - 'Benchmarking tests'
   - 'Test'
 
 jobs:
   include:
+    - stage: 'Lint markdown files'
+      language: ruby
+      rvm: 2.4.1
+      os: linux
+      before_install: skip
+      install: gem install awesome_bot
+      before_script: skip
+      after_success: skip
+      script:
+        - find . -type f -name '*.md' -exec awesome_bot {} \;
+      notifications:
+        email: false
+ 
     - &integrationtest
       stage: 'Integration tests'
       merge_mode: replace
@@ -42,4 +54,6 @@ jobs:
       after_success: travis_terminate 0
     - <<: *integrationtest
       stage: 'Benchmarking tests'
+      addons:
+        srcclr: true
       env: SDK=ruby FULLSTACK_TEST_REPO=Benchmarking SDK_BRANCH=$TRAVIS_PULL_REQUEST_BRANCH