QA: Fix browser tests for issues (cleanup templates)

The page created for the test using API contained an external link so
page creation would fail on a vagrant instance with ConfirmEdit
installed (captcha would be triggered).

Also, use api helper instead of APIPage.

Change-Id: I82bf9b8c6b79961bfb35cf9c01dec479cc67f37f
Merge "QA: Fix browser tests for issues (cleanup templates)"