[Upgrade] upgrade network controller to v0.4.8

[John-Lin]

No description provided.

[codecov-io]

Codecov Report

Merging #309 into develop will not change coverage.
The diff coverage is 50%.

@@           Coverage Diff            @@
##           develop     #309   +/-   ##
========================================
  Coverage    75.54%   75.54%           
========================================
  Files           63       63           
  Lines         3693     3693           
========================================
  Hits          2790     2790           
  Misses         701      701           
  Partials       202      202

Impacted Files	Coverage Δ
src/ovscontroller/ovs_system.go	59.32% <0%> (ø)	⬆️
src/pod/pod.go	97.07% <100%> (ø)	⬆️
src/deployment/deployment.go	94.61% <100%> (ø)	⬆️

---

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 b003aa3...607f388. Read the comment docs.