Feature: add fetch service list and get service detail from k8s cluster api to backend

[HZ89]

What type of PR is this?

/kind feature

What this PR does / why we need it:
api add:

/api/v1/kubernetes/apps/:appId/services/namespaces/:namespace/clusters/:cluster
/api/v1/kubernetes/apps/:appId/services/:service/detail/namespaces/:namespace/clusters/:cluster

test result:

curl --location --request GET "http://127.0.0.1:8080/api/v1//kubernetes/apps/0/services/namespaces/default/clusters/minikube"

{
  "data": {
    "pageNo": 1,
    "pageSize": 10,
    "totalPage": 1,
    "totalCount": 2,
    "list": [
      {
        "objectMeta": {
          "name": "kubernetes",
          "namespace": "default",
          "labels": {
            "component": "apiserver",
            "provider": "kubernetes"
          },
          "creationTimestamp": "2018-12-20T08:35:42Z"
        },
        "typeMeta": {
          "kind": "service"
        },
        "internalEndpoint": {
          "host": "kubernetes",
          "ports": [
            {
              "port": 443,
              "protocol": "TCP",
              "nodePort": 0
            }
          ]
        },
        "externalEndpoints": null,
        "selector": null,
        "type": "ClusterIP",
        "clusterIP": "10.96.0.1"
      },
      {
        "objectMeta": {
          "name": "my-nginx",
          "namespace": "default",
          "labels": {
            "run": "my-nginx"
          },
          "annotations": {
            "kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"v1\",\"kind\":\"Service\",\"metadata\":{\"annotations\":{},\"labels\":{\"run\":\"my-nginx\"},\"name\":\"my-nginx\",\"namespace\":\"default\"},\"spec\":{\"ports\":[{\"port\":80,\"protocol\":\"TCP\"}],\"selector\":{\"run\":\"my-nginx\"}}}\n"
          },
          "creationTimestamp": "2018-12-20T09:13:35Z"
        },
        "typeMeta": {
          "kind": "service"
        },
        "internalEndpoint": {
          "host": "my-nginx",
          "ports": [
            {
              "port": 80,
              "protocol": "TCP",
              "nodePort": 0
            }
          ]
        },
        "externalEndpoints": null,
        "selector": {
          "run": "my-nginx"
        },
        "type": "ClusterIP",
        "clusterIP": "10.101.60.195"
      }
    ]
  }
}

curl --location --request GET "http://127.0.0.1:8080/api/v1//kubernetes/apps/0/services/my-nginx/detail/namespaces/default/clusters/minikube"

{
  "data": {
    "objectMeta": {
      "name": "my-nginx",
      "namespace": "default",
      "labels": {
        "run": "my-nginx"
      },
      "annotations": {
        "kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"v1\",\"kind\":\"Service\",\"metadata\":{\"annotations\":{},\"labels\":{\"run\":\"my-nginx\"},\"name\":\"my-nginx\",\"namespace\":\"default\"},\"spec\":{\"ports\":[{\"port\":80,\"protocol\":\"TCP\"}],\"selector\":{\"run\":\"my-nginx\"}}}\n"
      },
      "creationTimestamp": "2018-12-20T09:13:35Z"
    },
    "typeMeta": {
      "kind": "service"
    },
    "internalEndpoint": {
      "host": "my-nginx",
      "ports": [
        {
          "port": 80,
          "protocol": "TCP",
          "nodePort": 0
        }
      ]
    },
    "externalEndpoints": null,
    "endpointList": [
      {
        "objectMeta": {
          "creationTimestamp": null
        },
        "typeMeta": {
          "kind": "endpoint"
        },
        "host": "172.17.0.2",
        "nodeName": "minikube",
        "ready": true,
        "ports": [
          {
            "port": 80,
            "protocol": "TCP"
          }
        ]
      },
      {
        "objectMeta": {
          "creationTimestamp": null
        },
        "typeMeta": {
          "kind": "endpoint"
        },
        "host": "172.17.0.5",
        "nodeName": "minikube",
        "ready": true,
        "ports": [
          {
            "port": 80,
            "protocol": "TCP"
          }
        ]
      }
    ],
    "selector": {
      "run": "my-nginx"
    },
    "type": "ClusterIP",
    "clusterIP": "10.101.60.195",
    "eventList": [],
    "podList": null,
    "sessionAffinity": "None"
  }
}

[wilhelmguo]

LGTM @chengyumeng Please review the PR.

[chengyumeng]

这个文件不应该放在这个目录下面

[wilhelmguo]

@chengyumeng @HZ89 还有其他问题吗

[HZ89]

我没啥问题

[chengyumeng]

之前 review 提出的问题有一些还没回复呀 @HZ89 @wilhelmguo