JENKINS-10832 make reporter-output visible in test method result

Make reporter-output visible in test method result. Works with testng
6.7+ which include reporter-output alongside test method result
data in testng-results.xml
Cleanup TestParser
Merge branch 'master' of https://github.com/dalvizu/testng-plugin-plugin into dalvizu-master
JENKINS-10832 - make testng reporter-output field viewable from testng-plugin generated reports

Cleanup on Dan's checkin. Made reporterOutput a string instead of List<String>.
Also, updated the Parser accordingly and added a test.
Updated the location of reporter log on page and added some css styling.