reverting .travis.yml with MONGO2.6 and 3.0 commented

.travis.yml

@@ -1,22 +1,18 @@
 env:
-  - MONGODB_VERSION="2.6*"
-  - MONGODB_VERSION="3.0*"
+  # - MONGODB_VERSION="2.6*"
+  # - MONGODB_VERSION="3.0*"
   - MONGODB_VERSION="3.2*"
 
 before_install:
-  # GCC-5
+  # GCC-4.8
   - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
-  - sudo add-apt-repository ppa:ubuntu-toolchain-r/test
-  - sudo apt-get update -qq
-  - sudo apt-get install -y gcc-5 g++-5
   # MongoDB
   - if [[ "$TRAVIS_NODE_VERSION" != 0.* ]]; then sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test; fi
   - if [ "$MONGODB_VERSION" = "2.4*" ]; then echo "deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen" | sudo tee /etc/apt/sources.list.d/mongodb.list; fi
   - if [ "$MONGODB_VERSION" = "2.6*" ]; then echo "deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen" | sudo tee /etc/apt/sources.list.d/mongodb.list; fi
   - if [ "$MONGODB_VERSION" = "3.0*" ]; then echo "deb http://repo.mongodb.org/apt/ubuntu "$(lsb_release -sc)"/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list; fi
   - if [ "$MONGODB_VERSION" = "3.2*" ]; then echo "deb http://repo.mongodb.org/apt/ubuntu "$(lsb_release -sc)"/mongodb-org/testing multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.1.list; fi
   - sudo apt-get update -qq
-  - yes | sudo DEBIAN_FRONTEND=noninteractive apt-get -y upgrade
   - wget http://www.us.apache.org/dist/kafka/0.9.0.1/kafka_2.11-0.9.0.1.tgz -O kafka.tgz
   - mkdir -p kafka && tar xzf kafka.tgz -C kafka --strip-components 1
   - nohup bash -c "cd kafka && bin/zookeeper-server-start.sh config/zookeeper.properties &"
@@ -30,6 +26,7 @@ install:
   - if [ "$MONGODB_VERSION" != "2.4*" ]; then sudo apt-get install -y --force-yes -qq mongodb-org-server=`echo $MONGODB_VERSION`; fi
   - mongod --version
   - if [ "$MONGODB_VERSION" = "2.4*" ]; then sudo service mongodb start; fi
+  - if [[ "$TRAVIS_NODE_VERSION" != 0.* ]]; then sudo apt-get -y -qq install g++-4.8; export CXX="g++-4.8" CC="gcc-4.8"; fi
   - npm install
 
 before_script: