BaseConnection: reduce debug spam.
BaseConnection: reduce debug spam.

I don't think any of these have ever been of use to me. Including the
address of the object in the debug output once seems fine.

This shaves another 3% off the Gabble test suite debug output.

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib