Update soap.php

Dues to a bug in PHP/libcurl for windows spå-enduser hangs forever after login on PHP for windows:
https://bugs.php.net/bug.php?id=63411

This change fixes the issue - not tested on Linux.
Update soap.php

Changed sleep time from 0.1 ms to 100 ms
Merge pull request #1 from mikaelkj/patch-1

Update soap.php fixes issues with sp-enduser on Windows