daemon: Rename the variable 'id' to 'group'
daemon: Rename the variable 'id' to 'group'

It refers to the name of a group in the key file, not an ID.

https://bugzilla.gnome.org/show_bug.cgi?id=688041

ritzk/gnome-online-accounts,ritzk/gnome-online-accounts,ritzk/gnome-online-accounts