Make SocketService attributes final where possible.
Make SocketService attributes final where possible.

amolenaar/fitnesse,amolenaar/fitnesse,hansjoachim/fitnesse,rbevers/fitnesse,rbevers/fitnesse,hansjoachim/fitnesse,rbevers/fitnesse,jdufner/fitnesse,jdufner/fitnesse,amolenaar/fitnesse,jdufner/fitnesse,hansjoachim/fitnesse