Fixed one bug from test suite.

It failed to use appropriate template for user profile view.
Django used the one from muddle_users templates directory,
but we're overriding this view to use different template.

So now we override correctly.
Tests: fixed proxying in virtualmachines.tests using dirty hack

I'm not proud of it.  CallProxy (used by RapiProxy) apparently doesn't
work on module functions.  I don't want to introduce another Proxy
just for the sake of these tests.  I will, however, look closer, as
one test errors.

There's also some code/comments/etc to be cleaned.