Add coverage for Shell adapter's run method.
Add coverage for Shell adapter's run method.

chriswoodrich/lita,mcgain/lita,jimmycuadra/lita,jaisonerick/lita,liamdawson/lita,liamdawson/lita,natesholland/lita,brodock/lita,elia/lita,prsimp/lita,litaio/lita,crimsonknave/lita,MatthewKrey/lita,litaio/lita,natesholland/lita,brodock/lita,jaisonerick/lita,sadiqmmm/lita,elia/lita,tristaneuan/lita,byroot/lita,chriswoodrich/lita,tristaneuan/lita,crimsonknave/lita,PatrickTulskie/lita,sadiqmmm/lita,mcgain/lita,jimmycuadra/lita,byroot/lita,MatthewKrey/lita