since qvm-run use multiprocessing.Process now, stdin sent to it is
processed in separate process and doesn't come back to
TestApp.actual_calls (self.app). Annotate tests for now, to be fixed
later.
Since we use qubes.VMShell service now and send requested command on its
stdin, we need to terminate that shell after requested command -
otherwise the service will not terminate automatically waiting for
further input (next commands).
