add RabbitMQ check to dd-agent
this check is used to gather statistics from RabbitMQ's managment plugin
use active tomcat-7.0.34 mirror
use dd-agent util.json
Merge pull request #330 from brettlangdon/master

RabbitMQ Management Plugin Check
Update conf.d/jmx.yaml.example
Update conf.d/jmx.yaml.example
display shows and it works on python2.6 - still need to test 2.4 #314
removed unecessary comments #314
added selenium to the requirements.txt file for pip install
track zk timeouts as a metric
fix potential memory leak when using zk tags
Revert "added selenium to the requirements.txt file for pip install"

This reverts commit cdaffb76325ae64708f79820262934511fe03bba.
Merge pull request #331 from DataDog/add-hostnames-status

Added hostnames to status info fixes #314
Merge branch 'master' of github.com:DataDog/dd-agent into mem-pct-used