Check version of novaclient

def check_nova():
    '''
    Check version of novaclient
    '''
    if HAS_NOVA:
        novaclient_ver = _LooseVersion(novaclient.__version__)
        min_ver = _LooseVersion(NOVACLIENT_MINVER)
        if min_ver <= novaclient_ver:
            return HAS_NOVA
        log.debug('Newer novaclient version required.  Minimum: %s', NOVACLIENT_MINVER)
    return False