[BUG] Mount the ovs directory for tcp-network-controller

[hwchiu]

Use the DumpOVSPorts in the network-controller, we will get the following error message.
Failed to dump ports: exit status 1: ovs-ofctl: peaceful_cori is not a bridge or a socket
The reason is that we don't have the peaceful_cori.mgnt unix socker in the network-controller container.

So, we should mount whole ovs directory into the container.

[codecov-io]

Codecov Report

Merging #232 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #232   +/-   ##
========================================
  Coverage    78.58%   78.58%           
========================================
  Files           50       50           
  Lines         2484     2484           
========================================
  Hits          1952     1952           
  Misses         410      410           
  Partials       122      122

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3a7adf1...23f88ea. Read the comment docs.