Eliminate potential reference loops within RouterResponse lifecycle functions (#911)
Eliminate potential reference loops within RouterResponse lifecycle functions (#911)

* IBM-Swift/Kitura#879 Added reset functions for the life cycle function references and invoked them apppropriately

* IBM-Swift/Kitura#879 Fixed problems with a comment.

IBM-Swift/Kitura,naithar/Kitura,IBM-Swift/Kitura,naithar/Kitura,naithar/Kitura,naithar/Kitura,IBM-Swift/Kitura,IBM-Swift/Kitura