tests: Update JSON-RPC  introspection test to match changes core API
tests: Update JSON-RPC  introspection test to match changes core API

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