test: add lxcfs binary check

[Letty5411]

Signed-off-by: letty letty.ll@alibaba-inc.com

Ⅰ. Describe what this PR did

fix #606

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how you did it

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-io]

Codecov Report

Merging #1127 into master will increase coverage by 0.25%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1127      +/-   ##
==========================================
+ Coverage   15.54%   15.79%   +0.25%     
==========================================
  Files         172      172              
  Lines        9739     9622     -117     
==========================================
+ Hits         1514     1520       +6     
+ Misses       8116     7992     -124     
- Partials      109      110       +1

Impacted Files	Coverage Δ
client/client.go	33.33% <0%> (-3.04%)	⬇️
apis/server/container_bridge.go	0% <0%> (ø)	⬆️
daemon/mgr/cri.go	0% <0%> (ø)	⬆️
daemon/mgr/spec_blkio.go	0% <0%> (ø)	⬆️
daemon/mgr/container_types.go	15.38% <0%> (ø)	⬆️
cli/cli.go	0% <0%> (ø)	⬆️
cli/container.go	0% <0%> (ø)	⬆️
cli/common_flags.go	0% <0%> (ø)	⬆️
ctrd/snapshot.go	0% <0%> (ø)	⬆️
ctrd/image.go	0% <0%> (ø)	⬆️
... and 1 more

[Ace-Tang]

Could you also add --enable-lxcfs flag in pouchd flag check, @Letty5411

[allencloud]

LGTM, please answer @Ace-Tang 's question.

[Letty5411]

@Ace-Tang add it, PTAL.

[Ace-Tang]

Good, fix it will fail in my ubuntu.