Fix one of the failing tests reported in #2290
Fix one of the failing tests reported in #2290

The download_file() call displays a progress bar by default so make sure
the expected output reflects that.  Use a time range actually supported
by the IERS_A table in the example of setting t.delta_ut1_utc.

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