IntelliJ configuration: language level from 1.6 -> 1.7
IntelliJ configuration: language level from 1.6 -> 1.7

git-svn-id: 308d55f399f3bd9aa0560a10e81a003040006c48@1459378 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr