Comment 7 for bug 1841933

Reviewed: https://review.opendev.org/679247
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=31773715687326c92d4ad46ebb32b14645bbc614
Submitter: Zuul
Branch: master

commit 31773715687326c92d4ad46ebb32b14645bbc614
Author: Kobi Samoray <email address hidden>
Date: Tue Aug 27 13:49:05 2019 +0300

    Avoid fetching metadata when no subnets found

    Metadata service uses the provider id to identify the requesting
    instance.
    However, when provider query doesn't find any networks, the request
    should fail.
    The same goes to the case where multiple ports are found.

    Closes-Bug: #1841933
    Change-Id: I8ce3703ca86a3a0769edd42a790d82796d1071d7