remove py 3.4 and 3.5 from travis allowed_failures
remove py 3.4 and 3.5 from travis allowed_failures

artemutin/beets,pkess/beets,shamangeorge/beets,jackwilsdon/beets,artemutin/beets,mosesfistos1/beetbox,SusannaMaria/beets,mosesfistos1/beetbox,ibmibmibm/beets,lengtche/beets,shamangeorge/beets,jackwilsdon/beets,shamangeorge/beets,mosesfistos1/beetbox,pkess/beets,diego-plan9/beets,sampsyo/beets,artemutin/beets,sampsyo/beets,jackwilsdon/beets,pkess/beets,MyTunesFreeMusic/privacy-policy,diego-plan9/beets,xsteadfastx/beets,madmouser1/beets,beetbox/beets,madmouser1/beets,beetbox/beets,lengtche/beets,Kraymer/beets,pkess/beets,MyTunesFreeMusic/privacy-policy,Kraymer/beets,Kraymer/beets,SusannaMaria/beets,xsteadfastx/beets,lengtche/beets,SusannaMaria/beets,Kraymer/beets,SusannaMaria/beets,mosesfistos1/beetbox,lengtche/beets,diego-plan9/beets,ibmibmibm/beets,artemutin/beets,ibmibmibm/beets,jackwilsdon/beets,sampsyo/beets,beetbox/beets,sampsyo/beets,xsteadfastx/beets,MyTunesFreeMusic/privacy-policy,xsteadfastx/beets,diego-plan9/beets,ibmibmibm/beets,madmouser1/beets,madmouser1/beets,shamangeorge/beets,MyTunesFreeMusic/privacy-policy,beetbox/beets