[bluez] use source name for default properties instead of destination

Otherwise property is not reset to default because corresponding
setter is not found

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
Merge pull request #27 from nemomobile/bluez-fix-properties-reset

[bluez] use source name for default properties instead of destination
[tools] script to create power issues report
[ofono] enum usage refactoring

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
using newer statefspp api

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[ofono] use enums to identify properties

Decrease amount of points of failure - no string but statically
checked enum class members.

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>