[CODEC-244] Update from Java 6 to Java 7.

Travis: remove java 6 build 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1812874 13f79535-47bb-0310-9956-ffa450edef68

Author: PascalSchumacher

.travis.yml

@@ -17,21 +17,8 @@ language: java
 sudo: false
 
 jdk:
-  - openjdk6
   - openjdk7
   - oraclejdk8
 
-addons:
-  apt:
-    packages:
-      - openjdk-6-jdk
-
-# use java 6 compatible maven version (installed into target directory so rat check passes)
-before_install:
-  - wget https://archive.apache.org/dist/maven/maven-3/3.2.5/binaries/apache-maven-3.2.5-bin.zip -P ./target
-  - unzip -qq ./target/apache-maven-3.2.5-bin.zip -d ./target
-  - export M2_HOME=$PWD/target/apache-maven-3.2.5
-  - export PATH=$M2_HOME/bin:$PATH
-
 after_success:
   - mvn clean cobertura:cobertura coveralls:report