Mend install script
Mend install script

* sed regexp & opt to edit a dpdk.conf
* ovs-vsctl cmd errata

Change-Id: I10e489a86aa8c4d3910e60bc68cae89e343bdd2d

georgepar/fuel-plugin-ovs-mirror,georgepar/fuel-plugin-ovs-mirror,georgepar/fuel-plugin-ovs-mirror