Hotfix: Update keepalive settings and grpc request timeout
This MR updates the following keep-alive settings:
keepalive_time_ms=30000,
keepalive_timeout_ms=20000,
keepalive_permit_without_calls=False,
http2_max_pings_without_data=2,
Client timeout was set to 30 seconds as well.
Edited by Alexander Chueshev