Remove the use of of_site from the tests
Remove the use of of_site from the tests

larrybradley/astropy,aleksandr-bakanov/astropy,mhvk/astropy,pllim/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy,astropy/astropy,saimn/astropy,StuartLittlefair/astropy,saimn/astropy,larrybradley/astropy,saimn/astropy,astropy/astropy,larrybradley/astropy,pllim/astropy,lpsinger/astropy,pllim/astropy,mhvk/astropy,astropy/astropy,astropy/astropy,StuartLittlefair/astropy,saimn/astropy,lpsinger/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,astropy/astropy,mhvk/astropy,pllim/astropy,larrybradley/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,saimn/astropy,mhvk/astropy,mhvk/astropy,pllim/astropy,lpsinger/astropy,lpsinger/astropy,lpsinger/astropy