Comment 1 for bug 1817218

Reviewed: https://review.opendev.org/638307
Committed: https://git.openstack.org/cgit/x/networking-vpp/commit/?id=f661e06e4ac3b906e1d9591ac101bcbb1f077f72
Submitter: Zuul
Branch: master

commit f661e06e4ac3b906e1d9591ac101bcbb1f077f72
Author: Naveen Joy <email address hidden>
Date: Fri Feb 8 12:54:28 2019 -0800

    Optimize GPE VNI allocation & train release support

    GPE networks have a large pool of allocatable
    Virtual Network Identifiers (VNIs) - 16+ Million. The prior
    implementation stores each unallocated VNI in the specified
    range, for allocation in the Neutron DB.

    This patch optimizes VNI allocation in the DB, by dynamically
    computing a valid VNI for allocation at network creation time,
    thereby storing only the allocated VNIs in Neutron DB.

    Mypy code added; couple of method signatures changes; removed
    some hard work that previously generated a log about whether
    a released segment was a tenant segment or not.

    Also, provides GPE type driver support for the Train
    release.

    Closes-bug: #1817218
    Change-Id: I5413c130103431ad031fc19a65b4f0aa85cf5c72