Based on Jon Hall's feedback, bounce karaf default version to 3.0.8.
This is the default for the latest onosproject docker image on dockerhub.
Keep the karaf version for CiaB manifest on 3.0.5.
Add a manifest-cluster.json to spin up a 3 node ONOS cluster with cord-tester.

Change-Id: Ib5b238fd6e32dd46af37d2dd1db5841c1512e7fa
diff --git a/build-onos-docker.sh b/build-onos-docker.sh
index 2f782df..039d047 100755
--- a/build-onos-docker.sh
+++ b/build-onos-docker.sh
@@ -110,9 +110,9 @@
 ENV HOME /root
 ENV JAVA_HOME /usr/lib/jvm/java-8-oracle
 ENV ONOS_ROOT /src/onos
-ENV KARAF_VERSION 3.0.5
-ENV KARAF_ROOT /root/onos/apache-karaf-3.0.5
-ENV KARAF_LOG /root/onos/apache-karaf-3.0.5/data/log/karaf.log
+ENV KARAF_VERSION 3.0.8
+ENV KARAF_ROOT /root/onos/apache-karaf-3.0.8
+ENV KARAF_LOG /root/onos/apache-karaf-3.0.8/data/log/karaf.log
 ENV BUILD_NUMBER docker
 ENV PATH \$PATH:\$KARAF_ROOT/bin
 
@@ -133,7 +133,7 @@
 # 8181 - GUI
 # 8101 - ONOS CLI
 # 9876 - ONOS CLUSTER COMMUNICATION
-EXPOSE 6653 8181 8101 9876
+EXPOSE 6653 8181 8101 9876 5005
 
 # Get ready to run command
 WORKDIR /root/onos