Upgrade Akka 2.1.4, close #1164
Upgrade Akka 2.1.4, close #1164

timve/gatling,MykolaB/gatling,MykolaB/gatling,gatling/gatling,MykolaB/gatling,wiacekm/gatling,ryez/gatling,timve/gatling,ryez/gatling,MykolaB/gatling,gatling/gatling,wiacekm/gatling,gatling/gatling,pwielgolaski/gatling,thkluge/gatling,gatling/gatling,thkluge/gatling,pwielgolaski/gatling,wiacekm/gatling,GabrielPlassard/gatling,ryez/gatling,ryez/gatling,pwielgolaski/gatling,wiacekm/gatling,GabrielPlassard/gatling,GabrielPlassard/gatling,timve/gatling,thkluge/gatling,wiacekm/gatling,gatling/gatling,timve/gatling,pwielgolaski/gatling,thkluge/gatling,GabrielPlassard/gatling