Update akka version to 2.3.1
Update akka version to 2.3.1

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