updated elasticsearch version in the pom
changed the QueryGenerators and add EntityMetaData to the ElasticSearchService in order to know which fields are Mref so that we could create nested query for those fields
Merge branch 'master' of https://github.com/molgenis/molgenis
updated the elasticsearch mapping and index in ElasticSearchService backend, now all the MREF are stored at nested type
Merge branch 'master' of https://github.com/molgenis/molgenis
Add DataService as a parameter to ElasticSearchService constructor and now it is required to initialize the ElasticSearchService instance
removed the commented code from IndexRequestGenerator.java
Merge pull request #1672 from ChaoPang/master

Introduced ElasticSearch nested type into index for MREF fields