Comment 8 for bug 1499187

Reviewed: https://review.opencontrail.org/14457
Committed: http://github.org/Juniper/contrail-controller/commit/5c67f2e51194f42aca5258dbc9c37a47065bf827
Submitter: Zuul
Branch: R2.20

commit 5c67f2e51194f42aca5258dbc9c37a47065bf827
Author: sbalineni <email address hidden>
Date: Thu Oct 15 15:28:46 2015 -0700

DM: DM should not add family tag if family is not present

Sometimes, it is noticed that Bgp Session paramter has config
something like with all empty values:

"session": [
{
"attributes": [
{
"address_families": {
"family": []
},
"auth_data": null,
"bgp_router": null
}
],
"uuid": null
}

DM should check for real presense of family value.

Change-Id: I4d48e1da97999a52e4c381521a69ba5735145360
Closes-Bug: #1499187