[#eng-3896] Bump ES version.
[#eng-3896] Updates for API changes.
[#eng-3896] Wall hack to work around composing a non-public method.
[#eng-3896] Bump to 0.90.0-SNAPSHOT.
Bump to 0.90.0 final.
Merge pull request #34 from sonian/eng-3896-es-0.90

Updates for ElasticSearch 0.90.0 release.