Comment 4 for bug 1708209

Reviewed: https://review.openstack.org/490150
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=4979b06bb4ce60620fba37003c287b6ab2e2eb02
Submitter: Zuul
Branch: master

commit 4979b06bb4ce60620fba37003c287b6ab2e2eb02
Author: Zane Bitter <email address hidden>
Date: Wed Aug 2 14:49:22 2017 -0400

    Add catch-all for property errors in implicit dependencies

    The previous patch ensures that we ignore errors getting properties in
    all extant add_dependencies() methods for calculating implicit
    dependencies. To guard against similar errors in future, also ignore and
    log any uncaught ValueError or TypeError exceptions encountered during
    implicit dependency calculation.

    Change-Id: I2cac0add975e36a9c52b9cbb50f0660882322754
    Related-Bug: #1708209