* remove mapkeeper and voldemort from command help, since we don't build them
* fix ordering of modules in root pom

closes #328

* Add oraclejdk9 to .travis.yml

* Upgrade maven-compiler-plugin

* Exclude jdk.tools from hadoop dependency

* Set minimum maven version to 3.1.0+, due to reqs for ES testing
* remove oracle jdk7 per travis-ci/travis-ci#7884
* Skip ES5 cluster spin-up if tests are skipped.
* Increase test heap for asynchbase binding from Travis 2048m to 4096m
  - https://docs.travis-ci.com/user/build-environment-updates/2017-09-06/
* temporarily remove the riak service on travis
  - currently fails w/o details
  - http://docs.basho.com/ fails to load, so I can't spin up a test node locally.

Signed-off-by: Chris Larsen <clarsen@yahoo-inc.com>

This commit removes an unrelated POM change for the original
(Elasticsearch 2) binding.

This commit bumps the Elasticsearch dependency version of the
Elasticsearch 5 binding to version 5.5.1.

The API used by googlebigtable has had quite a bit of churn.  This is the minimal set of changes required for the upgrade.

Signed-off-by: Chris Larsen <clarsen@yahoo-inc.com>

Also fix a read serialization issue with client mode driver.

Signed-off-by: Chris Larsen <clarsen@yahoo-inc.com>

Signed-off-by: Chris Larsen <clarsen@yahoo-inc.com>

[hbase12] Add HBase 1.2+ specific client that relies on the shaded client artifact provided by those versions. (#970)

[kudu] Update Kudu binding to 1.1.0, use slf4j for logging, improve table partitioning

RedundantThrows is unreliable and latest checkstyle removes it.
https://github.com/checkstyle/checkstyle/issues/5#issuecomment-52593242

[geode] Update to Apache Geode version 1.0.0-incubating.M3

[arangodb] Add ArangoDB Support

Note the Guava classes in the test directory for AsyncHBase. These are there
as AsyncHBase uses Guava >= 18 while HBase and the mini cluster use Guava 12.

The binding is based on the one created by Basho Technologies (available at https://github.com/basho-labs/YCSB/tree/master/riak).
[riak] Made compatible with the latest YCSB version.
[riak] Added strong consistency test support and made it default.
[riak] Added missing results return based on provided fields in scan/read functions.
[riak] Added TIME_OUT status return code for those transactions which take too long to complete.
[riak] Added flexible test parameter specification via customizable configuration file and command line options support.
[riak] Added test unit.
[riak] Removed unused Constants.java file.
[riak] Removed many unused function in the RiakUtils.java file.
[riak] Choosed to use executeAsync methods to resolve a bug that didn't allow the benchmark to end whenever one or more nodes of the cluster are killed.
[riak] Fixed license issues in all files.
[riak] Done some refinements to the code.