revert to old travis file

.travis.yml

@@ -1,13 +1,15 @@
 language: node_js
-sudo: false
-services:
-  - mongodb
 node_js:
   - '4.1'
+before_install:
+  - "sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10"
+  - "echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list"
+  - "sudo apt-get update"
+  - "sudo apt-get install mongodb-org-server"
 before_script:
   - 'npm install -g grunt-cli mocha'
   - cp config.json.example config.json
   - "until nc -z localhost 27017; do echo Waiting for MongoDB; sleep 1; done"
   - "export DISPLAY=:99"
 after_script:
-  - "./node_modules/.bin/lcov-result-merger 'coverage/**/*.info' | ./node_modules/coveralls/bin/coveralls.js"
+  - "./node_modules/.bin/lcov-result-merger 'coverage/**/*.info' | ./node_modules/coveralls/bin/coveralls.js"