'Checks to see if the TMOS version is less than 12.1.0
Versions prior to 12.1.0 have a bug which prevents the REST
API from properly listing any UCS files when you query the
/mgmt/tm/sys/ucs endpoint. Therefore you need to do everything
through tmsh over REST.
:return: Bool'

def is_version_v1(self):

    version = self.client.api.tmos_version
    if (LooseVersion(version) < LooseVersion('12.1.0')):
        return True
    else:
        return False
