Disable inclusion of commons-logging in load tester

nifty-load-tester uses airlift/bootstrap, which brings in jcl-over-slf4j. Can't bring in both jcl-over-slf4j and commons-logging.
Update dependency versions for release
Merge commit '3df0270ee861f00a858619895ec1be771161adc5'
Bump to version 0.14.0-SNAPSHOT