Return a list of extra args that need to be passed on cmdline to nova.

def check_for_bypass_url(raw_creds, nova_args):
    """
    Return a list of extra args that need to be passed on cmdline to nova.
    """
    if 'BYPASS_URL' in raw_creds.keys():
        bypass_args = ['--bypass-url', raw_creds['BYPASS_URL']]
        nova_args = bypass_args + nova_args

    return nova_args