[bug 741792] Murder fixtures in dashboard tests.
Fix Bug 863543

See https://bugzilla.mozilla.org/show_bug.cgi?id=863543
[bug 741783] Stop using fixtures in wiki tests.
[bug 572856] Fix docstring lengths for tests

This covers the following apps:

* access
* activity
* announcements
* customercare
* dashboards
* flagit
* forums