Updated mediawiki/extensions
Project: mediawiki/extensions/UploadWizard  4889150a4dfe409cdc5d2c5725e4bc170440a834

do not craft our own api url

mediawiki.api.js is now smart enough to do this properly.

the only reason we used to craft our own url here is because
mediawiki.api.js got its start inside UploadWizard. But,
if we create our API url this way, it can mess up Selenium
testing on Vagrant due to mismatches of port numbers

Change-Id: Iac25239cf240934bd1e3ce349c05f1b41eb23b8c