added ConfigurationItem tests
added ConfigurationItem tests

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