Fixed config test with discrete options
Fixed config test with discrete options

StuartLittlefair/astropy,pllim/astropy,joergdietrich/astropy,MSeifert04/astropy,pllim/astropy,saimn/astropy,saimn/astropy,stargaser/astropy,lpsinger/astropy,kelle/astropy,stargaser/astropy,larrybradley/astropy,stargaser/astropy,kelle/astropy,lpsinger/astropy,funbaker/astropy,dhomeier/astropy,mhvk/astropy,larrybradley/astropy,tbabej/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,AustereCuriosity/astropy,pllim/astropy,DougBurke/astropy,MSeifert04/astropy,saimn/astropy,astropy/astropy,kelle/astropy,astropy/astropy,funbaker/astropy,saimn/astropy,tbabej/astropy,StuartLittlefair/astropy,larrybradley/astropy,aleksandr-bakanov/astropy,kelle/astropy,StuartLittlefair/astropy,AustereCuriosity/astropy,stargaser/astropy,joergdietrich/astropy,dhomeier/astropy,tbabej/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,larrybradley/astropy,joergdietrich/astropy,larrybradley/astropy,dhomeier/astropy,astropy/astropy,pllim/astropy,funbaker/astropy,AustereCuriosity/astropy,bsipocz/astropy,bsipocz/astropy,saimn/astropy,mhvk/astropy,mhvk/astropy,DougBurke/astropy,mhvk/astropy,lpsinger/astropy,AustereCuriosity/astropy,astropy/astropy,joergdietrich/astropy,aleksandr-bakanov/astropy,pllim/astropy,DougBurke/astropy,dhomeier/astropy,astropy/astropy,DougBurke/astropy,funbaker/astropy,lpsinger/astropy,StuartLittlefair/astropy,MSeifert04/astropy,AustereCuriosity/astropy,tbabej/astropy,tbabej/astropy,lpsinger/astropy,kelle/astropy,dhomeier/astropy,StuartLittlefair/astropy,joergdietrich/astropy,mhvk/astropy,MSeifert04/astropy