This change set:

1) Wires the consenter into the registrar
2) Wires the communication to the consenter and
   to the registrar, in preperation for multi-node Raft.
   This makes a new chain configure the communication layer
   of the cluster according to the TLS certificates
   of the channel.
3) Adds a unit test that spawns a Raft OSN

Change-Id: I3923f6f5e0fae6428c2be2e056b82355332f3324
Signed-off-by: yacovm <yacovm@il.ibm.com>