Unbreak tests by requiring a GStreamer version before importing 'gst'
Unbreak tests by requiring a GStreamer version before importing 'gst'

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