vxlan datanetwork attributes not accessible from dbapi calls

[Joseph Richard]

Brief Description
-----------------
dbapi.interface_datanetwork_get_by_interface does not return vxlan datanet attributes datanetwork_port_num, datanetwork_multicast_group, datanetwork_ttl, or datanetwork_mode, even when they are set.

Severity
--------
Minor

Steps to Reproduce
------------------
Write down the steps to reproduce the issue

Expected Behavior
------------------
Expect this dbapi calls include vxlan attributes if set

Actual Behavior
----------------
this dbapi call doesn't include vxlan attributes.

Reproducibility
---------------
100%

System Configuration
--------------------
Any

Branch/Pull Time/Commit
-----------------------
stx-config/master e2bcaab2b5bed6493fe0694525c13423073f28e2

Last Pass
---------
unknown

Timestamp/Logs
--------------
NA

Test Activity
-------------
Development

[Ghada Khalil (gkhalil)]

Marking as release gating; networking issue with vxlan config

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/663036
Committed: https://git.openstack.org/cgit/starlingx/config/commit/?id=a867995943e218be9a7bceefbaecddbfd1242842
Submitter: Zuul
Branch: master

commit a867995943e218be9a7bceefbaecddbfd1242842
Author: Joseph Richard <email address hidden>
Date: Wed Jun 19 09:16:46 2019 -0500

    Fix accessing SysinvObject optional foreign fields

    This commit fixes SysinvObject._from_db_object to enable accessing
    fields in _foreign_fields that are also in _optional_fields.
    This is necessary to enable accessing vxlan multicast_group, port_num,
    ttl, and mode fields from the DataNetworks objects, and also enables
    polymorphic loading of those fields.
    This commit also fixes polymorphic loading of datanetwork vxlan
    attributes.

    Change-Id: I685fe6bf6adc436fc7f7100c622f02d1d236d8f3
    Closes-bug: 1831782
    Signed-off-by: Joseph Richard <email address hidden>