CommandAwareRpcDispatcher should not swallow exceptions when handling inbound RPC

Comment from a user:

The allocation point was an Object deserialization triggered by
Infinispan's unmarshalling code, and the OOME was swallowed by
org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.handle()
by catching Throwable – which only logs the Throwable if log.trace is
enabled (yuck).