Fix a bug in the recent change to Group and DefaultReviewer forms.

Review Request #8441 — Created Sept. 26, 2016 and submitted — Latest diff uploaded

Information

Review Board
release-2.5.x
b60951e...

Reviewers

I fixed the forms for when they were being used on the admin root, but
introduced a bug when they were being used inside a local site. This change
alters things to pull everything out of kwargs before passing things up to the
superclass.

Ran unit tests.