scanner: move _query_duration() into _process()
scanner: move _query_duration() into _process()

vrs01/mopidy,mopidy/mopidy,adamcik/mopidy,jodal/mopidy,kingosticks/mopidy,jcass77/mopidy,jodal/mopidy,vrs01/mopidy,vrs01/mopidy,adamcik/mopidy,ZenithDK/mopidy,jodal/mopidy,ZenithDK/mopidy,jcass77/mopidy,vrs01/mopidy,ZenithDK/mopidy,ZenithDK/mopidy,mopidy/mopidy,adamcik/mopidy,mopidy/mopidy,kingosticks/mopidy,kingosticks/mopidy,jcass77/mopidy