Fixes bugs in ovs dpdk

Fixes bugs in ovs dpdk

Changes Include:
 - Fixes an issue where using non-1st nic admin network deployment would
   result in loss of network connectivity during deployment.
 - Fixes an issue where not specifying cores to pin to in performance
   options would result in an incorrect '0' value used for core mask.

JIRA: APEX-452
JIRA: APEX-453

Change-Id: I413290161abd9b2fa39b659d5ff989da9554f603
Signed-off-by: Tim Rozet <trozet@redhat.com>
(cherry picked from commit c9bde98a9729dbc442ce8c0cdbc29c7d35167db6)