Updated code to satisfy the checkstyle validation.

Fixes #365

In order to get the tests to pass again, reverted MongoDbClient to use update with upsert instead of insert when batch size is 1.

Added journal=true back into MongoDB connection string.  For now, the connection string will contain both "j" and "journal", until such time as the MongoDB Java driver supports "journal".

Simplified insert CRUD code to always use insertMany even when batchSize == 1,
 as there is no performance penalty for this in the driver.

Changed visibility of static field from protected to private in final OptionsSupport class for MongoDB.

Changes:
1. mongodb configuration parameter bug (mongodb.url)
2. README file change
3. Some cleanup. Default DB is 'ycsb'

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

* remove unused declared deps in a few places
* lex sort modules in top level pom
* update maven plugin versions.
* no more jar-with-dependencies
* set ycsb-core to provided in bindings
* introduce a bindings-parent pom that sets
** stage dependency copy on building binding
** iff binding has a README.md, build a binding-specific dist artifact
* update distribution assembly to
** properly build after modules
** use per-binding sets of dependencies

closes #250

1. mongodb configuration parameter bug (mongodb.url)
2. README file change
3. Some cleanup. Default DB is 'ycsb'

MongoDB 3.0 driver.

Created tests for the basic DB operations.

Updated MongoDB Inc. Driver version to 3.0.2.

* 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.

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

URI to configure the client. Old properties are deprecated and but will
be added to the URI if present and the URI does not already contain a
value for the setting.

When running workloads that use the "insert" operation, we get a lot of
duplicate key exceptions from the server. Changing to upsert to avoid
these exceptions.

Changed reference to original forked repo which is not maintained to this repo to avoid conflicting instructions.   Might want to do that for top level README as well.

example