Add getAge and getPackageName

[harcher81]

Two missing informations about tests.

The age is to use with plugin and the packageName is very usefull to get url of tests.

I use this with email-ext to send custom mail from many execution of testng.

[AndrewGnagy]

@harcher81 I've got a similar branch that also adds in a column in the results.

https://github.com/jenkinsci/testng-plugin-plugin/compare/master...enndubyu:failureAge

What would you think of merging these two?

[AndrewGnagy]

Updating my link. Merge result would be: (untested) https://github.com/jenkinsci/testng-plugin-plugin/compare/master...andrewgnagy:addFailAgeColumn