Add Support for Bucket Tagging and Server-Side Encryption

[ykoer]

I added support for turning objectbucketclaim labels to bucket tags and also a possibility to enable default S3 bucket encryption

objectbucketclaim with labels:

apiVersion: objectbucket.io/v1alpha1
kind: ObjectBucketClaim
metadata:
  name: myobc
  namespace: s3-provisioner
  labels:
    appcode: YOUR_APP_CODE
spec:
  storageClassName: s3-existing-buckets 

Annotated Storage Class to enable server-side encryption

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: s3-buckets
  annotations:
    aws-s3-server-side-default-encryption: "true"
provisioner: aws-s3.io/bucket
parameters:
  region: us-west-1
  secretName: s3-bucket-owner
  secretNamespace: s3-provisioner

Unfortunately, lib-bucket-provisioner is overwriting all the passed in labels with: bucket-provisioner=aws-s3.io-bucket
I had to patch it to merge all labels.

Let me know, if you have any questions

Thanks
Yusuf