Comment 9 for bug 1471201

Reviewed: https://review.opencontrail.org/12293
Committed: http://github.org/Juniper/contrail-controller/commit/a0ee99004c86575cfdb9672ae47fb975cc20b180
Submitter: Zuul
Branch: master

commit a0ee99004c86575cfdb9672ae47fb975cc20b180
Author: Prabhjot Singh Sethi <email address hidden>
Date: Thu Jul 9 12:22:58 2015 +0530

Handle display name change from empty to non-empty

Issue:
------
In certain configuration update scenarios we may receive
Physical Device or Physical Interface entry without display
name, however while translating this information to OVSDB
we need to mandatory have display name available, not
having display name available was not handled.

Fix:
----
Ignore logical interface object till display name for both
Physical Device and Interface is available, added change
to trigger updates to logical interface on display name
change using dependency tracker.

Fix propagation of Physical Device display name to Physical
Device VN as well.

Fixed test case to check for vxlan-id of ovs-logical-switch
validation

Added test case to simulate order in which display name for
Physical Device and Physical Interface is not available
during creation time.

Partial-Bug: 1471201
Change-Id: I958792a7c28da0e5019c5342dd1e7bdc473aae9d