Fixed: Clicking the cancel button in the Add Web services screen results in an error no matter what data was filled in (bug#8656).
Squashed commit of the following:

commit c3045a27da5bba08be8edaea80c5311b6616f026
Author: s7design <otrs@s7designcreative.com>
Date:   Tue Jan 28 23:08:00 2014 +0100

    [Bug 8656]
    Clicking the cancel button in the Add Web services screen results in an error no matter what data was filled in

    Cancel button had contain additional action that has't been required and that cause error