Fixing review comments.
Fixing review comments.

Note:
This delivery is going to introduce a different behavior for org.testng.TestNG#getReporters
Going forward, invoking getReporters() is ONLY going to give users a copy of the reporters set and NOT the 
original set by itself. So any attempts at altering the reporters list by doing testng.getReporters().add() will not
add new reporters. You should be using addListener() to add reporters as well.

gjuillot/testng,emopers/testng,krmahadevan/testng,akozlova/testng,emopers/testng,emopers/testng,emopers/testng,missedone/testng,missedone/testng,cbeust/testng,missedone/testng,AJ-72/testng,AJ-72/testng,cbeust/testng,missedone/testng,cbeust/testng,krmahadevan/testng,krmahadevan/testng,akozlova/testng,gjuillot/testng,krmahadevan/testng,emopers/testng,akozlova/testng,gjuillot/testng,akozlova/testng,AJ-72/testng,akozlova/testng,gjuillot/testng,missedone/testng,AJ-72/testng,gjuillot/testng,cbeust/testng,AJ-72/testng,krmahadevan/testng,cbeust/testng,AJ-72/testng