bugfix: make container exit with real exit code

[Ace-Tang]

Fixes: #1075

Signed-off-by: Ace-Tang aceapril@126.com

Ⅰ. Describe what this PR did

1. make container exit with real exit code
2. fix stop wait after stdin close
3. fix some test case hang, such as this will hang forever, miss detach flag.

-       command.PouchRun("run", "--name", name, "-m", "512M", "--enableLxcfs=true",
+       command.PouchRun("run", "-d", "--name", name, "-m", "512M", "--enableLxcfs=true",

4. fix container exit code not equal 0 after container start

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 #1099 into master will decrease coverage by 0.41%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #1099      +/-   ##
==========================================
- Coverage   15.89%   15.48%   -0.42%     
==========================================
  Files         172      171       -1     
  Lines        9563     9597      +34     
==========================================
- Hits         1520     1486      -34     
- Misses       7933     8003      +70     
+ Partials      110      108       -2

Impacted Files	Coverage Δ
cli/main.go	0% <0%> (ø)	⬆️
cli/run.go	0% <0%> (ø)	⬆️
cli/cli.go	0% <0%> (ø)	⬆️
cli/start.go	0% <0%> (ø)	⬆️
daemon/mgr/container.go	5% <0%> (-0.01%)	⬇️
pkg/utils/utils.go	75.64% <0%> (-2.52%)	⬇️
cli/command.go

[Ace-Tang]

I fixed lots of test, please help to review them, @Letty5411 , thanks

[allencloud]

Please help to review this. @Letty5411

[Letty5411]

LGTM