tests: Disable the GVFS remote volume monitor when running tests
tests: Disable the GVFS remote volume monitor when running tests

We don’t need it, and it can cause GVFS to emit a warning about not
being able to spawn org.gtk.vfs.Daemon, which will cause our tests to
fail.

GNOME/folks,pwithnall/folks,GNOME/folks,GNOME/folks,pwithnall/folks,pwithnall/folks