Update the Review Board SVN repo path in the user manual database fixtures.
Update the Review Board SVN repo path in the user manual database fixtures.

The legacy Review Board SVN repo has moved to a new service, now that
Google Code is dead. This updates the user manual's database fixtures to
point to the new path.

chipx86/reviewboard,sgallagher/reviewboard,brennie/reviewboard,reviewboard/reviewboard,sgallagher/reviewboard,reviewboard/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,brennie/reviewboard,chipx86/reviewboard,davidt/reviewboard,sgallagher/reviewboard,brennie/reviewboard,chipx86/reviewboard,davidt/reviewboard,brennie/reviewboard,reviewboard/reviewboard,davidt/reviewboard,davidt/reviewboard,sgallagher/reviewboard