Chart & Operator support for replica configuration

[mrajashree]

Context: Today BRO chart and operator logic isn't designed or intended to have multiple replicas. This is a known aspect of the BRO design and for now it's intended to be a "singleton" pod.

#41 (comment)

To consider:

• Manage lease when more than one operator pods(controllers) are running
• Adjusting the Chart to allow replicas to be configured