Next dev version
[DOC] Update Maven version

(cherry picked from commit 752d8180241871997d6c0120ace8099705493b04)
Add MultiOutputFormat to test suite

(cherry picked from commit 081c74274f7721a41895f8b5358733e9846ba019)
[SparkSQL] mapping falls back to String for unknown types

relates #302
Add validation of (non-lowercase) indices

relates #300

(cherry picked from commit 34cb5560be300f404458bb79c0570bc87b8bf08e)
[TEST]-Disable file output for now
Add more defaults for Hadoop-like envs

Mesos or other Hadoop-like environments do not set all the Hadoop
properties which can lead to errors. To prevent them, the defaults
from Hadoop itself are added as a fallback to minimize the impact.

relates #305
Improve test to always consider local timezone
[DOC] Add reference to conjars.org

close #304
[TEST]Improve MultiOutputFormat (MR old api compatibility)
[TEST] Minor polishing
Improve HDFS repository readme

close #306
Improve build status icon
Improve HTTP authentication

Add separated options for HTTP authentication without proxies
Add SSL support

Allow SSL to be configured for the REST layer

fix #310
Add SSL integration tests
[DOC] Add SSL and basic auth options
Introduce Elasticsearch YARN project

Relates #321
Significantly improve compatibility across YARN versions

Since the API between Hadoop versions is not backwards compatible,
expand the compat layer to allow the binary to run across 2.2, 2.3,
2.4, 2.4.1, 2.5 and 2.5.1. Note the latest 2.4 (2.4.1) is recommended.
Additionally add plenty of polishing to the CLI

related to #321
Remove unused configuration options
Improve bug occurring with slow container allocation
More polishing