(QENG-714/QENG-686) use all junit tags available for beaker xml output...

... provide local xslt for viewing beaker xml output

- switch over to nokogiri (cleaner, easier)
- add logs to system-out tag
- add tag for time that each test suite takes to execute
- add property tags for each beaker option
- add junit.xsl stylesheet to interpret test results
Merge pull request #293 from anodelman/junit

(QENG-714) use all junit tags available for beaker xml output