[orientdb] rebased PR183: "Upgraded OrientDB"

closes #183 

[docs] update README for 0.2.0 release.

[core] Execute correct number of operations

[infinispan] rebased PR228: "Client-Server mode benchmark support for infinispan"

[aerospike] Support Aerospike.

Closes #113.

[scripts] clean up runtime classpath.

closes #315 

1) fix handling of later binding versions, e.g. hbase-10
2) fix reading conf dir for binding-specific artifacts
3) allow running from source checkout by asking maven for artifact locations

[packaging] remove CHANGELOG

Closes #294

YCSB now tracks what's in a given release using release notes.

ref:
https://github.com/brianfrankcooper/YCSB/releases

HBase README updates

Issue #319: [tarantool] Error on scan operation and replace problems

closes #319

Issue #278: [hbase] YCSB does not throw error if there is no table created

[mongodb] update parameter for connection url to match previous behavior and docs.

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

closes #302 ycsb launcher should only include binding specific jars in the classpath

the classpath, rather than all of them.

Pass original exception back when issues discovered during
initialization.

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

[voldemort] disable voldemort pending maven accessible artifacts.

[packaging] ensure datastore binding specific distributions include core transitive deps

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