[FAB-1566] Hook ingress policy into standard path

https://jira.hyperledger.org/browse/FAB-1566

This changeset concludes the changeset series which brings filtering
incoming broadcasts by policy.  Presently, the provisional bootstrapper
defaults the ingress policy to AcceptAll, but, this can be changed in
the future once actual signature validation works.

While attempting to bring the bdd genesis block creation into parity
with this change, a few extraneous bugs were discovered and fixed in the
bdd bootstrap util.

Change-Id: I2f61308350a77991b50c8478c708563d70674fb8
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

bddtests/orderer/ab_pb2_grpc.py

@@ -0,0 +1,63 @@
+import grpc
+from grpc.framework.common import cardinality
+from grpc.framework.interfaces.face import utilities as face_utilities
+
+import common.common_pb2 as common_dot_common__pb2
+import orderer.ab_pb2 as orderer_dot_ab__pb2
+import orderer.ab_pb2 as orderer_dot_ab__pb2
+import orderer.ab_pb2 as orderer_dot_ab__pb2
+
+
+class AtomicBroadcastStub(object):
+
+  def __init__(self, channel):
+    """Constructor.
+
+    Args:
+      channel: A grpc.Channel.
+    """
+    self.Broadcast = channel.stream_stream(
+        '/orderer.AtomicBroadcast/Broadcast',
+        request_serializer=common_dot_common__pb2.Envelope.SerializeToString,
+        response_deserializer=orderer_dot_ab__pb2.BroadcastResponse.FromString,
+        )
+    self.Deliver = channel.stream_stream(
+        '/orderer.AtomicBroadcast/Deliver',
+        request_serializer=orderer_dot_ab__pb2.SeekInfo.SerializeToString,
+        response_deserializer=orderer_dot_ab__pb2.DeliverResponse.FromString,
+        )
+
+
+class AtomicBroadcastServicer(object):
+
+  def Broadcast(self, request_iterator, context):
+    """broadcast receives a reply of Acknowledgement for each common.Envelope in order, indicating success or type of failure
+    """
+    context.set_code(grpc.StatusCode.UNIMPLEMENTED)
+    context.set_details('Method not implemented!')
+    raise NotImplementedError('Method not implemented!')
+
+  def Deliver(self, request_iterator, context):
+    """deliver first requires an update containing a seek message, then a stream of block replies is received.
+    """
+    context.set_code(grpc.StatusCode.UNIMPLEMENTED)
+    context.set_details('Method not implemented!')
+    raise NotImplementedError('Method not implemented!')
+
+
+def add_AtomicBroadcastServicer_to_server(servicer, server):
+  rpc_method_handlers = {
+      'Broadcast': grpc.stream_stream_rpc_method_handler(
+          servicer.Broadcast,
+          request_deserializer=common_dot_common__pb2.Envelope.FromString,
+          response_serializer=orderer_dot_ab__pb2.BroadcastResponse.SerializeToString,
+      ),
+      'Deliver': grpc.stream_stream_rpc_method_handler(
+          servicer.Deliver,
+          request_deserializer=orderer_dot_ab__pb2.SeekInfo.FromString,
+          response_serializer=orderer_dot_ab__pb2.DeliverResponse.SerializeToString,
+      ),
+  }
+  generic_handler = grpc.method_handlers_generic_handler(
+      'orderer.AtomicBroadcast', rpc_method_handlers)
+  server.add_generic_rpc_handlers((generic_handler,))