[CELEBORN-1401] Add SSL support for ratis communication #2515
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What changes were proposed in this pull request?
When SSL is enabled for master, secure the Ratis communication as well with TLS
Why are the changes needed?
Currently, when TLS is enabled for RPC, Ratis comms still goes in the clear - add support for TLS.
Note that currently this only supports GRPC, and not netty.
Does this PR introduce any user-facing change?
Secures ratis communication when TLS is enabled at master for rpc.
How was this patch tested?
Local tests and additional unit tests added