updated dependencies

git-svn-id: https://svn.code.sf.net/p/culturegraph/code/search/trunk@1709 f2a00648-b9af-4511-a9bd-0c59966c402f
* DoubleCheckLocking is no longer supported by Checkstyle 5.6

git-svn-id: https://svn.code.sf.net/p/culturegraph/code/search/trunk@1722 f2a00648-b9af-4511-a9bd-0c59966c402f