feature: implement Status of cri manager

[YaoZengzeng]

Signed-off-by: YaoZengzeng [email protected]

1.Describe what this PR did

2.Does this pull request fix one issue?

fixes part of #420

3.Describe how you did it

4.Describe how to verify it

Maybe the cri-tools is what you need.

We may use the following method to verify that we can get status of cri manager:

[root@pouch-test monster]# crictl info
{
  "status": {
    "conditions": [
      {
        "type": "RuntimeReady",
        "status": true,
        "reason": "",
        "message": ""
      },
      {
        "type": "NetworkReady",
        "status": true,
        "reason": "",
        "message": ""
      }
    ]
  }
}

5.Special notes for reviews

[codecov-io]

Codecov Report

Merging #520 into master will decrease coverage by 0.11%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #520      +/-   ##
==========================================
- Coverage   18.04%   17.93%   -0.12%     
==========================================
  Files          35       35              
  Lines        1790     1801      +11     
==========================================
  Hits          323      323              
- Misses       1432     1443      +11     
  Partials       35       35

Impacted Files	Coverage Δ
daemon/mgr/cri.go	0% <0%> (ø)	⬆️

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[allencloud]

LGTM