[rbdemo] Delete the SCMTools prior to loading in fixtures.

Review Request #7138 — Created March 30, 2015 and submitted — Latest diff uploaded

Information

rb-extension-pack
7f928bd...

Reviewers

It was easy to get into a situation where SCMTools from the fixtures
conflicted with what was populated from registerscmtools. We now clear
out the SCMTools in the database immediately before we load the fixture
data.

This fixed a problem I had on demo.reviewboard.org with deploying updates
to the fixtures.