Update Travis Build Parameters (pandas-dev#282)

Author: bmoscon

.travis.yml

@@ -1,10 +1,18 @@
-sudo: false
+sudo: required
+dist: trusty
 language: python
 python:
   - "2.7"
   - "3.4.5"
   - "3.5.2"
+before_install:
+  - sudo apt-key adv --keyserver keys.gnupg.net --recv 6DA70622
+  - sudo echo "deb http://downloads.ortussolutions.com/debs/noarch /" | sudo tee -a /etc/apt/sources.list.d/commandbox.list
+  - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927
+  - sudo echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.2 multiverse" | sudo tee -a /etc/apt/sources.list.d/mongodb-org-3.2.list
 install:
+  - sudo apt-get update && sudo apt-get --assume-yes install mongodb-org
+  - mongo --version
   - pip install --upgrade pip
   - pip install python-dateutil --upgrade
   - pip install pytz --upgrade