add more cleanup after ScienceState tests
add more cleanup after ScienceState tests

mhvk/astropy,saimn/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,pllim/astropy,lpsinger/astropy,larrybradley/astropy,dhomeier/astropy,larrybradley/astropy,mhvk/astropy,saimn/astropy,astropy/astropy,pllim/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,dhomeier/astropy,lpsinger/astropy,astropy/astropy,StuartLittlefair/astropy,bsipocz/astropy,pllim/astropy,stargaser/astropy,astropy/astropy,astropy/astropy,lpsinger/astropy,stargaser/astropy,larrybradley/astropy,mhvk/astropy,aleksandr-bakanov/astropy,astropy/astropy,saimn/astropy,bsipocz/astropy,MSeifert04/astropy,larrybradley/astropy,lpsinger/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,bsipocz/astropy,saimn/astropy,dhomeier/astropy,MSeifert04/astropy,StuartLittlefair/astropy,stargaser/astropy,stargaser/astropy,saimn/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,dhomeier/astropy,pllim/astropy,larrybradley/astropy,mhvk/astropy,bsipocz/astropy,lpsinger/astropy,pllim/astropy,StuartLittlefair/astropy,mhvk/astropy