Complete the removal of the Bluez's DBus Characteristic API

It never worked and was not used. In the future there might be a new
GATT DBUS API offered by Bluez.

Change-Id: If4c05d37e330ff3cdcda3ef3458938e2bce30725
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>
Rename QLowEnergyControllerNew -> QLowEnergyController

Moves the new API into its place and completes the removal of the old
API.

Change-Id: I10a285e24e288aeb747cb1606574e27a4bf57308
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>