Reverted all Travis changes. Didn't do what I expected.

.travis.yml

@@ -1,24 +1,11 @@
 sudo: true
 language: java
-
-env:
-  - CXX=g++-5
-
-  addons:
-    apt:
-      sources:
-        - ubuntu-toolchain-r-test
-      packages:
-        - g++-5
-
 script:
   - mvn install
-  
 jdk:
   - openjdk6
   - oraclejdk7
   - oraclejdk8
-  
 before_install:
   - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
   - sudo add-apt-repository ppa:fkrull/deadsnakes -y