Add additional IntelliJ project file to Git ignore

[scripts, couchbase] deprecate the old 'couchbase' client in favor of 'couchbase2'.

Various Elasticsearch improvements

This commit adds the IntelliJ ipr extension to .gitignore. These project
files are created when running the Maven goal idea:idea.

This commit upgrades the Elasticsearch dependency from version 2.3.2 to
version 2.3.4

Today when running the Elasticsearch binding in embedded mode, a
temporary directory is used. This can be confusing for running usual
load-then-run style workflows because the temporary directory will not
be the same between runs. Instead, we should just require a directory
when running in embedded mode and this commit makes this the case.

This commit switches the Elasticsearch test runner from TestNG to JUnit.

This commit adds notes to the Elasticsearch documentation outlining the
difference between embedded and remote modes, and adds an example on
using remote mode.

[jdbc]Fix bug in constructing CREATE TABLE SQL statement

[scripts] Rados missing from properties file for new platform-specific scripts.

[release] update README for 0.10.0 release.

[couchbase2] fix regressions introduced in latest changes

this properly fixes #786 which has been reverted since it has some
side effects on other workloads and causes regressions.

This needs to be reverted because it breaks all the other codepaths since it
just doesn't return anything on read or scan.

This reverts commit 44660de7.

This fixes a regression introduced by switching over to the raw
workload where the key looks different now. The code trims and
removes the " " so that only the proper key is passed for retrieval.

[core] solve issue with hdrhistogram+raw 

Solve issue with hdrhistogram+raw which had combined hdrhistogram with histogram

[couchbase2] logical error in decode()

When dataintegrity=true, no field values in passed to verifyRow() for verify and keep on getting error.

[packaging] ensure new ycsb runner scripts are included in distribution tarballs.

[scripts] Add mvn build if necessary for source checkout on windows. …

[couchbase2] Update Java SDK version, query for workloade

[scripts] Add mvn build if necessary for source checkout on windows.  Plus a couple other fixups to make consistent with the linux script.

[kudu] Update Kudu binding to 0.9.0

Shell scripts to run YCSB.

Using RAW queries reduces overhead at cbq-engine on the cluster and
reduces transport.  This in turn delivers lower latencies and thus
higher throughput with YCSB's tight loops of requests.

Adding an ORDER BY maintains strict correctness with the intended
implementation of Workload E.  In this particular case, the
ORDER BY is effectively a noop since the index in use is ordered
anyway.

The README for couchbase2 was also updated to reflect the simpler
index creation which is possible with Couchbase Server 4.5.  Server
4.5 automatically covers on the primary index so there is no need
for the more complicated syntax unless using an older version.

Note this change requires the 2.3.1 Couchbase Java SDK and its
underlying core-io 1.3.1.  The core-io 1.3.1 adds a streaming
parser for RAW results.

Add batching in insertion in JDBC client bindings

Fix a typo in Histogram generator

[mongodb] return OK on updates with w=0