python: added plugin configuration to grilo-test-ui
python: added plugin configuration to grilo-test-ui

Added a configuration setup for Flickr, Youtube and Vimeo

Signed-off-by: Simón Pena <0de4c53a4ebe7d5ef090e7bc2b86f9aecd2074a1@gmail.com>

grilofw/grilo,grilofw/grilo,MathieuDuponchelle/grilo,GNOME/grilo,MathieuDuponchelle/grilo,kyoushuu/grilo,grilofw/grilo,kyoushuu/grilo,jasuarez/grilo,jasuarez/grilo,jasuarez/grilo,kyoushuu/grilo,MathieuDuponchelle/grilo,kyoushuu/grilo,GNOME/grilo