Comment 2 for bug 1653780

Reviewed: https://review.openstack.org/416364
Committed: https://git.openstack.org/cgit/openstack/neutron-lib/commit/?id=73adf55f35211737b069e24dd42c97c7c2e46ac8
Submitter: Jenkins
Branch: master

commit 73adf55f35211737b069e24dd42c97c7c2e46ac8
Author: Manjeet Singh Bhatia <email address hidden>
Date: Tue Jan 3 22:23:25 2017 +0000

    Add FQDN_FIELD_SIZE constant

    FQDN_MAX_LEN has been defined at multiple locations
    in neutron tree, I encountered a situation where use
    of this constant from neutron/extensions/dns.py ended
    up in cyclic import. The better solution would be to
    have it in neutron lib and use it everywhere.

    Related-Bug: #1653780

    Change-Id: Ifd13f6d85bd7c7f5f803eaa8aac0e16c0f0edff7