update to elastic 1.4.2
update to elastic 1.4.2

We need a version above 1.3 to use topHits aggregations.

to migrate from 1.2.1:
- create a snapshot for index rinfo http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-snapshots.html
- download and install 1.4.2
- restore snapshot in 1.4.2
- rebuild rinfo-service

rinfo/rdl,rinfo/rdl,rinfo/rdl,rinfo/rdl,rinfo/rdl,rinfo/rdl