Merge BTLE service names into QBluetoothUuid::serviceClassToString()

Change-Id: I83a99666b8b16ae80ad7712785ee294cb340add1
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>
Fix abortion of QLowEnergyController processing of given service

This is caused when the BTLE service has read-only characteristics
only. This prevented the controller from ever emitting the connected()
signal for the particular service.

The patch further improves the comments and debugging capabilities
of QLowEnergyController on Linux/Bluez4.

Change-Id: Ic8f92e8fce964ac562ca4a01de06902f2da5d437
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>