[BEANUTILS-504] Update from Java 6 to 7
[BEANUTILS-504] Update from Java 6 to 7

.travis.yml: remove jdk 6 build

git-svn-id: 19e396b6ca62314521b249a9dd88f4ec6383bfb3@1823084 13f79535-47bb-0310-9956-ffa450edef68

apache/commons-beanutils,apache/commons-beanutils,apache/commons-beanutils