Fix issue with preRestart missing a method parameter for the message.

In Akka, preRestart method is defined as:

  public void preRestart(Throwable reason, Option<Object> message)

But Mikka is only defining the method as a single parameter:

def pre_restart(reason); end
def preRestart(reason); super; pre_restart(reason); end

This is causing an issue with actor restarts on line 91 of mikka.rb, which is throwing this exception:

org.jruby.exceptions.RaiseException: (ArgumentError) wrong number of arguments (2 for 1)

This PR fixes this issue by adding the missing message option parameter

Adds missing method parameter to Java and Ruby methods
In order to avoid dealing with Option in Ruby, extracts value from option if defined, otherwise pass nil.

iconara / mikka