Topology ProtoBuf refactoring

- Renamed definition and generated file to better explain what it defines.
  - RCProtos.java -> Topology.java
  - ramcloud.proto -> topology.proto
- Moved generated code to core/datastore/serializers package.
- Add memo about generating Java source from .proto definition.
- Update references
- Updated exclusion rules

Change-Id: I5ae2d70c81987afaa621f10fa4b40a3f314a0ebb
diff --git a/conf/findbugs/exclude.xml b/conf/findbugs/exclude.xml
index ce20793..08b3b5a 100644
--- a/conf/findbugs/exclude.xml
+++ b/conf/findbugs/exclude.xml
@@ -7,7 +7,7 @@
           (under build and reporting)
      -->
      <Match>
-       <Class name="~net.onrc.onos.core.datastore.RCProtos(.*)?" />
+       <Class name="~net\.onrc\.onos\.core\.datastore\.serializers\..*" />
      </Match>
      <Match>
        <Class name="~.*edu\.stanford\..*"/>