update elasticsearch 0.90.7 to 0.90.13 (which updates lucene 4.5.1 to 4.6.1)
Merge pull request #1489 from dennishendriksen/master

Update elasticsearch 0.90.7 to 0.90.13 (updates lucene 4.5.1 to 4.6.1)
Merge branch 'master' of https://github.com/molgenis/molgenis
Fix for issue #1451