attrib: Fix not disconnecting
attrib: Fix not disconnecting

The default behavior of GAttrib is to disconnect on unref but patch
0ea75ab4bb3ff96a50785cf2b9860011c49fd7b7 had changed that in order to
fix a warning, this return the old behavior but leaves to bt_att to do
the actual closing.

mapfau/bluez,ComputeCycles/bluez,mapfau/bluez,pkarasev3/bluez,silent-snowman/bluez,ComputeCycles/bluez,silent-snowman/bluez,pkarasev3/bluez,ComputeCycles/bluez,ComputeCycles/bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,mapfau/bluez,mapfau/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,pkarasev3/bluez,silent-snowman/bluez