Add podLabels to amazon-vpc-cni chart

[leandrocostam]

Issue

#457

Description of changes

Add podLabels parameter to aws-vpc-cni chart

Checklist

• Added/modified documentation as required (such as the README.md for modified charts)
• Incremented the chart version in Chart.yaml for the modified chart(s)
• Manually tested. Describe what testing was done in the testing section below
• Make sure the title of the PR is a good description that can go into the release notes

Testing

1 - Helm Install debug mode without podLabels parameter

Command: helm install --dry-run --debug aws-vpc-cni ./aws-vpc-cni

Output:

...
# Source: aws-vpc-cni/templates/daemonset.yaml
kind: DaemonSet
apiVersion: apps/v1
metadata:
  name: aws-node
  labels:
    app.kubernetes.io/name: aws-node
    helm.sh/chart: aws-vpc-cni-1.1.3
    app.kubernetes.io/instance: aws-vpc-cni
    k8s-app: aws-node
    app.kubernetes.io/version: "v1.7.5"
    app.kubernetes.io/managed-by: Helm
spec:
  updateStrategy:
    rollingUpdate:
      maxUnavailable: 10%
    type: RollingUpdate
  selector:
    matchLabels:
      app.kubernetes.io/name: aws-node
      app.kubernetes.io/instance: aws-vpc-cni
  template:
    metadata:
      labels:
        app.kubernetes.io/name: aws-node
        app.kubernetes.io/instance: aws-vpc-cni
        k8s-app: aws-node
    spec:
      priorityClassName: "system-node-critical"
      serviceAccountName: aws-node
...

2 - Helm Install debug mode with podLabels parameter

Command: helm install --dry-run --debug aws-vpc-cni ./aws-vpc-cni --set-string podLabels.mylabel=system-log

Output:

# Source: aws-vpc-cni/templates/daemonset.yaml
kind: DaemonSet
apiVersion: apps/v1
metadata:
  name: aws-node
  labels:
    app.kubernetes.io/name: aws-node
    helm.sh/chart: aws-vpc-cni-1.1.3
    app.kubernetes.io/instance: aws-vpc-cni
    k8s-app: aws-node
    app.kubernetes.io/version: "v1.7.5"
    app.kubernetes.io/managed-by: Helm
spec:
  updateStrategy:
    rollingUpdate:
      maxUnavailable: 10%
    type: RollingUpdate
  selector:
    matchLabels:
      app.kubernetes.io/name: aws-node
      app.kubernetes.io/instance: aws-vpc-cni
      mylabel: system-log
  template:
    metadata:
      labels:
        app.kubernetes.io/name: aws-node
        app.kubernetes.io/instance: aws-vpc-cni
        k8s-app: aws-node
        mylabel: system-log
    spec:
      priorityClassName: "system-node-critical"
      serviceAccountName: aws-node

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jayanthvn]

LGTM 👍