Deploy MongoDB operator

[moshloop]

https://github.com/percona/percona-server-mongodb-operator + karina template:

apiVersion: db.flanksource.com/v1
kind: MongoDB
metadata:
  name: datastore
spec:
  backup:
    bucket: mongo-backups
    schedule: "0 */4 * * *"
  cpu: 4000m
  memory: 8Gi
  replicas: 3
  storage:
    size: 200Gi
    storageClass: io2
  parameters: {}

[tobernguyen]

I'm working on the template part for this.

[tobernguyen]

This issue can't be fully implemented until these 2 dependencies are fixed:

• keptn/keptn#3457
• https://jira.percona.com/browse/K8SPSMDB-420