Maven Surefire compatibility fixes.
Maven Surefire compatibility fixes.

Surefire passes
- threadCount as a string
- listeners either as a string or a list of classes

msebire/testng,gjuillot/testng,smaudet/testng,gjuillot/testng,jaypal/testng,smaudet/testng,s2oBCN/testng,VladRassokhin/testng,scr/testng,VikingDen/testng,cbeust/testng,cbeust/testng,JeshRJ/myRepRJ,juherr/testng,rschmitt/testng,krmahadevan/testng,VikingDen/testng,AJ-72/testng,JeshRJ/myRepRJ,6ft-invsbl-rbbt/testng,tremes/testng,missedone/testng,gjuillot/testng,krmahadevan/testng,jerome-jacob/testng,tremes/testng,s2oBCN/testng,raindev/testng,bmlct/testng,AJ-72/testng,aledsage/testng,aledsage/testng,meeroslaph/testng,jaypal/testng,AJ-72/testng,raindev/testng,scr/testng,emopers/testng,aledsage/testng,emopers/testng,scr/testng,JeshRJ/myRepRJ,scr/testng,VikingDen/testng,6ft-invsbl-rbbt/testng,krmahadevan/testng,jerome-jacob/testng,tremes/testng,msebire/testng,krmahadevan/testng,scr/testng,gjuillot/testng,rschmitt/testng,tobecrazy/testng,akozlova/testng,emopers/testng,6ft-invsbl-rbbt/testng,AJ-72/testng,meeroslaph/testng,VikingDen/testng,tremes/testng,VladRassokhin/testng,s2oBCN/testng,missedone/testng,s2oBCN/testng,msebire/testng,VladRassokhin/testng,cbeust/testng,jaypal/testng,AJ-72/testng,msebire/testng,juherr/testng,smaudet/testng,VikingDen/testng,tobecrazy/testng,aledsage/testng,gjuillot/testng,akozlova/testng,msebire/testng,bmlct/testng,aledsage/testng,tremes/testng,emopers/testng,bmlct/testng,meeroslaph/testng,bmlct/testng,VladRassokhin/testng,VladRassokhin/testng,jerome-jacob/testng,aledsage/testng,rschmitt/testng,emopers/testng,smaudet/testng,meeroslaph/testng,juherr/testng,akozlova/testng,cbeust/testng,raindev/testng,AJ-72/testng,6ft-invsbl-rbbt/testng,jaypal/testng,tobecrazy/testng,rschmitt/testng,smaudet/testng,rschmitt/testng,JeshRJ/myRepRJ,jerome-jacob/testng,cbeust/testng,juherr/testng,tobecrazy/testng,missedone/testng,akozlova/testng,raindev/testng,krmahadevan/testng,meeroslaph/testng,VladRassokhin/testng,missedone/testng,raindev/testng,akozlova/testng,6ft-invsbl-rbbt/testng,tobecrazy/testng,raindev/testng,jaypal/testng,bmlct/testng,juherr/testng,jerome-jacob/testng,missedone/testng,JeshRJ/myRepRJ,s2oBCN/testng