Upgrade to recent ES
test the more recent elastic search versions
(from redmine: issue id 491, created on 2018-01-22tgradl, closed on 2018-01-24)
- Relations:
- relates #496
- relates #492
test the more recent elastic search versions
(from redmine: issue id 491, created on 2018-01-22tgradl, closed on 2018-01-24)