fix tests broken by TrackInfo.index
fix tests broken by TrackInfo.index

diego-plan9/beets,lightwang1/beets,lightwang1/beets,dfc/beets,drm00/beets,sampsyo/beets,mried/beets,gabrielaraujof/beets,Dishwishy/beets,artemutin/beets,pdf/beets,krig/beets,madmouser1/beets,jayme-github/beets,lengtche/beets,pkess/beets,beetbox/beets,ruippeixotog/beets,kareemallen/beets,Kraymer/beets,andremiller/beets,ttsda/beets,pkess/beets,multikatt/beets,parapente/beets,m-urban/beets,sampsyo/beets,asteven/beets,arabenjamin/beets,imsparsh/beets,jmwatte/beets,Freso/beets,imsparsh/beets,xsteadfastx/beets,Dishwishy/beets,PierreRust/beets,ttsda/beets,Andypsamp/CODjunit,ttsda/beets,Kraymer/beets,sadatay/beets,artemutin/beets,mosesfistos1/beetbox,sampsyo/beets,MyTunesFreeMusic/privacy-policy,PierreRust/beets,Andypsamp/CODjunit,bj-yinyan/beets,mried/beets,andremiller/beets,moodboom/beets,xsteadfastx/beets,shanemikel/beets,sadatay/beets,untitaker/beets,sadatay/beets,beetbox/beets,swt30/beets,mried/beets,dfc/beets,krig/beets,m-urban/beets,multikatt/beets,asteven/beets,jmwatte/beets,MyTunesFreeMusic/privacy-policy,MyTunesFreeMusic/privacy-policy,jackwilsdon/beets,jmwatte/beets,swt30/beets,Dishwishy/beets,PierreRust/beets,tima/beets,tima/beets,marcuskrahl/beets,swt30/beets,lengtche/beets,Andypsamp/CODfinalJUNIT,shamangeorge/beets,multikatt/beets,dfc/beets,kelvinhammond/beets,jcoady9/beets,madmouser1/beets,andremiller/beets,ruippeixotog/beets,mathstuf/beets,jmwatte/beets,jackwilsdon/beets,randybias/beets,Andypsamp/CODfinalJUNIT,madmouser1/beets,beetbox/beets,MyTunesFreeMusic/privacy-policy,marcuskrahl/beets,kareemallen/beets,Freso/beets,madmouser1/beets,shamangeorge/beets,Wen777/beets,xsteadfastx/beets,YetAnotherNerd/beets,m-urban/beets,shanemikel/beets,SusannaMaria/beets,arabenjamin/beets,beetbox/beets,Kraymer/beets,lengtche/beets,moodboom/beets,moodboom/beets,kelvinhammond/beets,Andypsamp/CODfinalJUNIT,drm00/beets,imsparsh/beets,bj-yinyan/beets,LordSputnik/beets,mathstuf/beets,ttsda/beets,mosesfistos1/beetbox,ruippeixotog/beets,diego-plan9/beets,randybias/beets,gabrielaraujof/beets,Kraymer/beets,pdf/beets,gabrielaraujof/beets,lightwang1/beets,randybias/beets,mathstuf/beets,Andypsamp/CODfinalJUNIT,shanemikel/beets,jbaiter/beets,ruippeixotog/beets,swt30/beets,dfc/beets,randybias/beets,ibmibmibm/beets,mosesfistos1/beetbox,parapente/beets,LordSputnik/beets,Wen777/beets,pkess/beets,asteven/beets,marcuskrahl/beets,pkess/beets,PierreRust/beets,LordSputnik/beets,asteven/beets,marcuskrahl/beets,tima/beets,YetAnotherNerd/beets,Andypsamp/CODjunit,mathstuf/beets,jcoady9/beets,untitaker/beets,mosesfistos1/beetbox,bj-yinyan/beets,bj-yinyan/beets,ibmibmibm/beets,Dishwishy/beets,Andypsamp/CODjunit,ibmibmibm/beets,diego-plan9/beets,arabenjamin/beets,drm00/beets,SusannaMaria/beets,untitaker/beets,multikatt/beets,moodboom/beets,kelvinhammond/beets,YetAnotherNerd/beets,diego-plan9/beets,YetAnotherNerd/beets,shamangeorge/beets,lengtche/beets,Andypsamp/CODjunit,artemutin/beets,artemutin/beets,Wen777/beets,untitaker/beets,jackwilsdon/beets,kareemallen/beets,shamangeorge/beets,Freso/beets,jackwilsdon/beets,SusannaMaria/beets,ibmibmibm/beets,krig/beets,sadatay/beets,SusannaMaria/beets,LordSputnik/beets,imsparsh/beets,mried/beets,jbaiter/beets,lightwang1/beets,parapente/beets,xsteadfastx/beets,m-urban/beets,jayme-github/beets,jcoady9/beets,sampsyo/beets,kelvinhammond/beets,kareemallen/beets,Andypsamp/CODfinalJUNIT,tima/beets,gabrielaraujof/beets,arabenjamin/beets,drm00/beets,parapente/beets,Freso/beets,shanemikel/beets,jcoady9/beets