Record incidents and notifications via CRD/EAS

[tamalsaha]

kubectl get incidents -n default

[name]
cluster:<alert-name>:<timstamp>
node:<node-name>:<alert-name>:<timstamp>
pod:<pod-name>:<alert-name>:<timstamp>

[Labels]
alertName:
alertType: ClusterAlert / NodeAlert / PodAlert
objName:                  node name / pod name
recovered: true / false

timestamp format: YYMMDD-24HMM

apiVersion: monitoring.appscode.com/v1alpha1
kind: Acknowledgement
metadata:
  name: <incident-name>
  name: <incident-namespace>
spec:
  comment: ""
  skipNotify:
  # author