51517753: Publish JMeter reports to Sonar via Maven

Updated to use most recent fedora.jmx from ff-jmeter-madness.
Sets loop_count to 1000 and num_threads to 20.

TODO: pull the latest fedora.jmx from ff-jmeter-madness on demand?

https://www.pivotaltracker.com/story/show/51517753