test: add test cases about modifyContainerConfig&containerNetns

[starnop]

Signed-off-by: Starnop [email protected]

Ⅰ. Describe what this PR did

Ⅱ. Does this pull request fix one issue?

fixes part of #1756

Ⅲ. Describe how you did it

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-io]

Codecov Report

Merging #2062 into master will increase coverage by 3.78%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2062      +/-   ##
==========================================
+ Coverage   58.74%   62.53%   +3.78%     
==========================================
  Files         202      202              
  Lines       15535    16516     +981     
==========================================
+ Hits         9126    10328    +1202     
+ Misses       5301     4886     -415     
- Partials     1108     1302     +194

Flag	Coverage Δ
#criv1alpha1test	33.56% <ø> (-0.15%)	⬇️
#criv1alpha2test	34.23% <ø> (?)
#integrationtest	38.42% <ø> (-0.06%)	⬇️
#unittest	23.34% <ø> (+0.17%)	⬆️

Impacted Files	Coverage Δ
daemon/mgr/container.go	46.3% <0%> (-7.59%)	⬇️
ctrd/image.go	78.81% <0%> (-2.47%)	⬇️
ctrd/container.go	47.84% <0%> (-2.33%)	⬇️
cri/stream/remotecommand/httpstream.go	47.75% <0%> (-1.88%)	⬇️
cri/v1alpha1/cri_utils.go	84.16% <0%> (+0.71%)	⬆️
cri/stream/runtime.go	72.72% <0%> (+1.29%)	⬆️
daemon/mgr/container_exec.go	72.3% <0%> (+1.47%)	⬆️
daemon/logger/jsonfile/utils.go	73.17% <0%> (+1.62%)	⬆️
ctrd/watch.go	75.75% <0%> (+3.03%)	⬆️
cri/stream/remotecommand/exec.go	50% <0%> (+13.33%)	⬆️
... and 8 more

[YaoZengzeng]

LGTM