Run a command as subprocess, collect its output and returncode.

def step_i_run_command(context, command):
    """
    Run a command as subprocess, collect its output and returncode.
    """
    command_util.ensure_workdir_exists(context)
    context.command_result = command_shell.run(command, cwd=context.workdir)
    command_util.workdir_save_coverage_files(context.workdir)
    if False and DEBUG:
        print(u"run_command: {0}".format(command))
        print(u"run_command.output {0}".format(context.command_result.output))