[VOL-1499] Use precreated topic

This commit migrate from dynamically created kafka topic to
pre-created topic.  The changes are made in the rw_core, simulated
onu and olt adapters, and ponsim olt and onu adapters.
TODO: move the python shared library changes into the pyvoltha
repo.

Change-Id: Ia92287ec74009872e694aa22eb896d8a6487d231
diff --git a/python/adapters/kafka/container_proxy.py b/python/adapters/kafka/container_proxy.py
index efcf558..bd873d8 100644
--- a/python/adapters/kafka/container_proxy.py
+++ b/python/adapters/kafka/container_proxy.py
@@ -38,10 +38,10 @@
 @implementer(IComponent)
 class ContainerProxy(object):
 
-    def __init__(self, kafka_proxy, core_topic, my_listening_topic):
+    def __init__(self, kafka_proxy, remote_topic, my_listening_topic):
         self.kafka_proxy = kafka_proxy
         self.listening_topic = my_listening_topic
-        self.core_topic = core_topic
+        self.remote_topic = remote_topic
         self.default_timeout = 3
 
     def start(self):
@@ -92,7 +92,7 @@
                           to_topic=to_topic,
                           reply_topic=reply_topic)
                 if to_topic is None:
-                    to_topic = self.core_topic
+                    to_topic = self.remote_topic
                 if reply_topic is None:
                     reply_topic = self.listening_topic
                 result = yield self.kafka_proxy.send_request(rpc=rpc,
@@ -130,4 +130,4 @@
                     raise e
                 retry += 1
                 if retry == max_retry:
-                    to_topic = self.core_topic
+                    to_topic = self.remote_topic