[geode] Add Geode driver

Conflicts:
	bin/ycsb
        geode/src/main/java/com/yahoo/ycsb/db/GeodeClient.java
	pom.xml

[orientdb] put db conn stuff in sync method

All db connection and creation logic is the same, it is just pulled into
a synchronized method so that multiple threads run through the
connection process one at a time.

Fixes #571

[solr] tune down log output during tests.

Couchbase checkstyle

Also removed some unnecessary comments

Closes #480

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

[couchbase] implemented scan for couchbase

Adapted from #172

[core] Generator refactoring

[hbase] Changes to support secured HBase cluster 

Cleanup use of checkstyle and instructions

[core] synchronizing OneMeasurementTimeSeries

Fixes #604

[jdbc] solidified field ordering

Changes to account for the field ordering. Now correctly inserting and
updating field values so that they can be verified when using
dataintegrity=true.

Fixes #132

- 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.

- document duplicated info from top-level README
- remove defunct info on building nosqldb (obviated by #493)

Nosqldb re-added to the build and checkstyle cleanup

Accumulo cleanup and tests

closes #340

Dynamodb API update

Update README.md for version 0.6.0