Add test_clear_empty_playlist
Add test_clear_empty_playlist

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