CC13: support configuration of additional DPDK vrouter command line args

[Bernhard Koessler]

In a CC13/Contrail 5.0.1 setup with Intel X710 Fortville NICs, it is not possible to configure additional DPDK vrouter comand line args, e.g.: --vr_mempool_sz --dpdk_txd_sz --dpdk_rxd_sz

fix as per:
https://review.opencontrail.org/#/c/46453/ (master)
https://review.opencontrail.org/#/c/46454/ (R5.0)

I manually applied the fix and tested it. Need to track automated delivery and how to rollout to all nodes in cc13.

[alexey-mr (alexey-morlang)]

I am not clear what is this bug about, in tripleo it is possibly to provide env variable via ContrailSettings THT parameter.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/46847
Submitter: alexey-mr (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/46847
Committed: http://github.com/Juniper/contrail-tripleo-heat-templates/commit/b48553298e5cea7976062aa5fd742fdd53d77faa
Submitter: Zuul v3 CI (<email address hidden>)
Branch: stable/queens

commit b48553298e5cea7976062aa5fd742fdd53d77faa
Author: alexey-mr <email address hidden>
Date: Wed Oct 10 09:02:59 2018 +0300

Added ContrailDpdkOptions to pass adv. dpdk opts

This option is passwed as-is into dpdk cmd args.

Change-Id: I0c6461bfecc66e2193430b5b6c0e358d595670ac
Closes-Bug: #1795821