tests: Make test-bugs naming generic
tests: unref objects after running test

https://bugzilla.gnome.org/show_bug.cgi?id=678701
tests: Add test for #678701

Test that proxies created by ResourceFactory have the GType
set in gupnp_resource_factory_register_resource_proxy_type()

https://bugzilla.gnome.org/show_bug.cgi?id=678701
Ensure ResourceFactory creates proxies with right GType

https://bugzilla.gnome.org/show_bug.cgi?id=678701