adapter: Fix storage to be used by BlueZ 4 or 5
adapter: Fix storage to be used by BlueZ 4 or 5

Conversion should be performed only one time, but using "converted"
entry in device related files generates a bogus device object with
dev_CONVERTED path when starting BlueZ 4.

If "settings" file has been created we've done the conversion and
we can use it to check if conversion has already been done.

Remove "converted" entries in converted files

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