new test for setRequestHeader() and open()
reference python file on server instead of php
ws fixes
dropping superfluous variable declaration
using alternative method to get host ip address

Signed-off-by: AutomatedTester <dburns@mozilla.com>
cc Updated messages.json file.
cc Updated makefile.
Fixed typo in makefile.
Merge pull request #239 from w3c/Moz_Bug_819051_test

new test for setRequestHeader() and open()