Fixes #612.

This removes the need for the private Couchbase repository since the
1.4.10 criver is available in Maven Central.

- define checkstyle configs in as few places as possible
- use checkstyle:check since it has defaults that match what we want (fail after logging to console)
- modules that have current failures set property checkstyle.failOnViolation to false.

updating readme

updating package info

perfecting logic for http solr clients for all operations

renamed properties, tested cloud mode and cleaned code

removed dependency on dynamic field names, updated readme

now enforcing checkstyle

adding solr artifact

removing test cases relying on external dependencies

removed unused maven dependencies, added batch mode support, all try blocks now catch eplicit exceptions, Query/UpdateResponse status codes are handled more granularly, updated readme, added sample schema.xml file to support default field names in ycsb client, updated all license headers to 2016, using SolrClient object as primary client type regardless if Solr is running in Cloud or Stand-alone mode

cleaned code and config files, now accepting a solr base url property, simplified sample schema.xml file, renamed class to SolrClient, now updating documents atomically, added batch support to delete method

updated new line spacing of pom file comments

removed sample schema file, updated readme with more indepth explanation on running/setting up the solr-binding

removed some code lines no longer in use

renamed zookeeper param name, now throwing caught exceptions where appropriate, debug messages are now being logged on stderr

now returning an appropriate error if we receive an unexpected response from solr server, repeated calls to getResults is no longer

now using singletonMap to store update params in, fixed typo and missing id field in sample config in README

The version bump required some fixes because of changes to the OrientDB
API as well as to accomodate for changes in thread safety for testing.

blocks gh-542

The memcached support was extracted from PR #98 by @jbellis, with cleanups to
bring it in line with current APIs and style guide.

This PR also addresses issue #326.

This version and the previous one are wire compatible, the only code
chance reflects a naming change in the client API.

This reverts commit 0e5866eb.

Restores #372

Add a DB client for Google Cloud Datastore. This initial commit includes implementation of all CRUD operations (modulo scan), and integration into the rest of YCSB (pom.xml changes, etc)

Next few commits will include Scan/query support, single entity group support, and better documentation.

re-enable in the build.

Updated the binding to use the new Status class.

Currently doesn't include unit tests since we don't have mock objects for that.

HBase 0.94 requires an additional dependency on hadoop-core, but has no
source-level changes to the client.

hbase/ now contains the HBase v0.9 binding code.
hbase1/ now contains the HBase 1.0 binding code.

Fixes #344.

As a part of branching to stage 0.2.0 release in #266, set version
for continued development on master branch.

* use double-check idiom for remote cache manager.
* update version to 7.2.2.Final

closes #297