Future: Misc issues in Kubernetes manifests.

[rajat-soda]

Issue/Feature Description:
Identify and fix miscellaneous issues in K8s manifests.
- DONE: Get K8s Master IP before starting deploy (deploy is along running process, which blocks getting the IP )
- DONE: Add utility script to scale services.
- TODO: Document the scale feature.
- DONE: Correct kafka service name in utility script k8s-cleanup.sh
- TODO: Optimize deployment yamls - remove shell scripts
- DONE: Use secrets
- TODO: Use Ingress.

Why this issue to fixed / feature is needed(give scenarios or use cases):

How to reproduce, in case of a bug:

Other Notes / Environment Information: (Please give the env information, log link or any useful information for this issue)