upgrade to last netty version
upgrade to last netty version

for https://github.com/playframework/playframework/issues/3268

marcospereira/playframework,rajeshpg/playframework,benmccann/playframework,aradchykov/playframework,wegtam/playframework,richdougherty/playframework,Shenker93/playframework,wegtam/playframework,zaneli/playframework,mkurz/playframework,hagl/playframework,playframework/playframework,Shruti9520/playframework,aradchykov/playframework,playframework/playframework,wsargent/playframework,wegtam/playframework,rajeshpg/playframework,richdougherty/playframework,Shruti9520/playframework,mkurz/playframework,hagl/playframework,Shruti9520/playframework,marcospereira/playframework,zaneli/playframework,Shenker93/playframework,hagl/playframework,zaneli/playframework,wsargent/playframework,benmccann/playframework,ktoso/playframework,ktoso/playframework,aradchykov/playframework,ktoso/playframework,marcospereira/playframework,richdougherty/playframework,Shenker93/playframework,playframework/playframework,marcospereira/playframework,richdougherty/playframework,rajeshpg/playframework,mkurz/playframework,benmccann/playframework,Shenker93/playframework,wegtam/playframework,aradchykov/playframework,wsargent/playframework,Shruti9520/playframework,benmccann/playframework,ktoso/playframework,rajeshpg/playframework,mkurz/playframework,zaneli/playframework,hagl/playframework,wsargent/playframework