Refactor job template to include mediawiki_url

The job template now accepts mediawiki_url to vary the job name.  That
reduce the number of projects being defined since we now only need the
extension name.

For projects having different combinations of mediawiki user and
password depending on the URL, simply call the template several times
with appropriate settings.

The change is a noop.

Change-Id: I1b6f9617755a898ea9ed9b73186ee68261838af6
Refactor UploadWizard API template to use mediawiki_url

Only use one template to create jobs for UploadWizard API tests. Simply
pass matching mediawiki* parameters.

Change-Id: I96684e2c74f20f269a0d022137e12ae2b407695f