Release 0.2.9-adobe-2020915

Docker images:

• zookeeper image adobe/zookeeper:3.6.2-0.2.9-adobe-2020915
• operator image: adobe/zookeeper-operator:0.2.9-adobe-2020915

Changelog:

• Use getent instead of nslookup for starting scripts (#5)
• INTERNAL - Upgrade to zookeeper 3.6.2
• [INTERNAL] - Keep compatibility with helm2 - ADDENDUM Issue 188
• Issue 233: Fixed chart bug and made ready and unready fields as nullable and added checks for various crd fields (pravega#234)
• Adopt controller-gen to generate crd manifests and adopt helm v3 way of managing crds (pravega#227)
• Modifying zoo.cfg on rolling restarts (pravega#231)
• Issue 63: Added support for ephemeral storage (pravega#215)
• removed k8s.io/kubernetes (pravega#226)
• Make kubernetes cluster domain configurable (pravega#200)