Fix BasePlaybackController with respect to test_next_track_with_random and test_play_with_random
Fix BasePlaybackController with respect to test_next_track_with_random and test_play_with_random

priestd09/mopidy,mokieyue/mopidy,bacontext/mopidy,bacontext/mopidy,diandiankan/mopidy,abarisain/mopidy,quartz55/mopidy,swak/mopidy,bencevans/mopidy,jcass77/mopidy,vrs01/mopidy,abarisain/mopidy,quartz55/mopidy,jcass77/mopidy,tkem/mopidy,diandiankan/mopidy,priestd09/mopidy,SuperStarPL/mopidy,glogiotatidis/mopidy,tkem/mopidy,glogiotatidis/mopidy,vrs01/mopidy,adamcik/mopidy,diandiankan/mopidy,tkem/mopidy,pacificIT/mopidy,ali/mopidy,quartz55/mopidy,bencevans/mopidy,kingosticks/mopidy,pacificIT/mopidy,mokieyue/mopidy,jodal/mopidy,kingosticks/mopidy,bencevans/mopidy,jmarsik/mopidy,mokieyue/mopidy,hkariti/mopidy,SuperStarPL/mopidy,jmarsik/mopidy,bencevans/mopidy,ZenithDK/mopidy,vrs01/mopidy,SuperStarPL/mopidy,dbrgn/mopidy,tkem/mopidy,rawdlite/mopidy,swak/mopidy,jcass77/mopidy,rawdlite/mopidy,ZenithDK/mopidy,woutervanwijk/mopidy,pacificIT/mopidy,pacificIT/mopidy,jodal/mopidy,diandiankan/mopidy,hkariti/mopidy,swak/mopidy,bacontext/mopidy,rawdlite/mopidy,ali/mopidy,woutervanwijk/mopidy,liamw9534/mopidy,ZenithDK/mopidy,dbrgn/mopidy,adamcik/mopidy,bacontext/mopidy,dbrgn/mopidy,jodal/mopidy,priestd09/mopidy,glogiotatidis/mopidy,swak/mopidy,dbrgn/mopidy,mopidy/mopidy,vrs01/mopidy,kingosticks/mopidy,hkariti/mopidy,jmarsik/mopidy,ZenithDK/mopidy,hkariti/mopidy,ali/mopidy,liamw9534/mopidy,mokieyue/mopidy,SuperStarPL/mopidy,rawdlite/mopidy,adamcik/mopidy,ali/mopidy,quartz55/mopidy,mopidy/mopidy,glogiotatidis/mopidy,jmarsik/mopidy,mopidy/mopidy