Rebase and updated PR-94: "bump gemfire version to 7.0.2"

closes #94

* enabling gemfire module and updating to release 7.0.2
* verified that there are no failures while trying to resolve gemfire repo.
* fixed an NPE.

Amending-Author: Sean Busbey <sean.busbey@gmail.com>
Signed-off-by: Sean Busbey <sean.busbey@gmail.com>

[scripts] remove defunct ycsb.sh

[client] clean up status message creation.

[mongodb] Fix #277 - Switch from updateOne to replaceOne.

[hbase] Add a document for hbase-binding and remove hbase-site.xml

closes #191

MongoDB 3.0 driver.

Created tests for the basic DB operations.

Updated MongoDB Inc. Driver version to 3.0.2.

[core] Given the min and max parameter the ZipfianGenerator should not return *0*…

Clean up bin/ycsb.

* Use argparse for argument parsing.
* Add a '-jvm-args' flag, to pass arbirary options to java.
* Exit with the return code from java.

Requires Python 2.7.

[hbase] Make write buffer size of HBase client configurable

Given the min and max parameter ZipfianGenerator  should not return 0 if (uz < 1) nor 1 if (uz<1.0+Math.pow(0.5,theta)). Instead it should return the min value (base) or min + 1.

rebased PR145: "Added Cassandra CQL binding"

rebased PR136: "Adding support for Couchbase"

closes #136

Signed-off-by: Sean Busbey <sean.busbey@gmail.com>

This includes changes to main pom for the v1.2.9 cassandra driver.

closes #145

[core workload] Data Correctness Checking

TransportClient support for connecting to remote elastic search clusters

Workload template

[version] update to 0.2.0-SNAPSHOT.

* Need a SNAPSHOT version because non-SNAPSHOT is reserved for actual releases.
* Increment minor version per pre-1.0 guidelines from the Version Numbers guide

Fixes #236.

[Mongodb] merge adds Async mongodb driver, update normal driver to talk to mongo 2 and 3 clusters.

Add autoflush property to HBaseClient

to the 3.0 driver from MongoDB Inc. and updated to the new Document and
fluent APIs.