Added README to cluster management tools.

Change-Id: Iddbf15b5ca9925b230c97e9a0a6d34c54ec6a97e

Fixed a bug onos-cluster.sh doesn't set RAMCloud coordinator address correctly.
Segregated onos-cluster.sh output directory from cluster-mgmt/conf/.

Change-Id: Icf108a445133a145f565b0e72a4c819d42f6df47
diff --git a/cluster-mgmt/conf/template/onos_node.conf.template b/cluster-mgmt/conf/template/onos_node.conf.template
index 0dadf66..a97a36a 100644
--- a/cluster-mgmt/conf/template/onos_node.conf.template
+++ b/cluster-mgmt/conf/template/onos_node.conf.template
@@ -18,7 +18,7 @@
 ramcloud.coordinator.protocol = __RAMCLOUD_PROTOCOL__
 
 # IP address of RAMCloud coordinator (host.ip by default)
-ramcloud.coordinator.ip = __RAMCLOUD_IP__
+ramcloud.coordinator.ip = __RAMCLOUD_COORD_IP__
 
 # Port number of RAMCloud coordinator (12246 by default)
 ramcloud.coordinator.port = __RAMCLOUD_COORD_PORT__
@@ -27,7 +27,7 @@
 ramcloud.server.protocol = __RAMCLOUD_PROTOCOL__
 
 # IP address of RAMCloud server (host.ip by default)
-ramcloud.server.ip = __RAMCLOUD_IP__
+ramcloud.server.ip = __RAMCLOUD_SERVER_IP__
 
 # Port number of RAMCloud server (12242 by default)
 ramcloud.server.port = __RAMCLOUD_SERVER_PORT__