This PR adds a VAddr iterator mechanism for the communication policy context. VAddrs of a context do not need to be integers from 0 to the number of peers minus one anymore, but a communication policy need to implement the iterator mechanism to iterate over all peers of a context.
This PR adds a VAddr iterator mechanism for the communication policy context. VAddrs of a context do not need to be integers from 0 to the number of peers minus one anymore, but a communication policy need to implement the iterator mechanism to iterate over all peers of a context.