Revert change to Assert methods
Revert change to Assert methods

Changed type of messages back from CharSequence to String to maintain backward compatibility. See http://jira.opensymphony.com/browse/TESTNG-384

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