[BUG] REACT_APP_ENABLE_RBAC=false not recognized in registry service

[Yuqing-cat]

Willingness to contribute

Yes. I can contribute a fix for this bug independently.

Feathr version

latest

System information

• OS Platform and Distribution (e.g., Linux Ubuntu 20.0):
• Python version:
• Spark version, if reporting runtime issue:

Describe the problem

REACT_APP_ENABLE_RBAC variable is checked either configured or not rather than true or false.
In provision template, it's null if not true, so will not be a problem.

"[if(equals(parameters('enableRBAC'),'Yes'),json('true'),json('null'))]"

However, It might cause problem when user manually set REACT_APP_ENABLE_RBAC == false.

Tracking information

No response

Code to reproduce bug

No response

What component(s) does this bug affect?

• Python Client: This is the client users use to interact with most of our API. Mostly written in Python.
• Computation Engine: The computation engine that execute the actual feature join and generation work. Mostly in Scala and Spark.
• Feature Registry API: The frontend API layer supports SQL, Purview(Atlas) as storage. The API layer is in Python(FAST API)
• Feature Registry Web UI: The Web UI for feature registry. Written in React