Allow unhindered communication within the rabbit server cluster.

cloudformation_templates/edx-reference-architecture.json

@@ -2630,7 +2630,7 @@
             "FromPort":"5672",
             "ToPort":"5672",
             "SourceSecurityGroupId" : {
-		"Ref" : "RabbitMQELBSecurityGroup" 
+		"Ref" : "RabbitMQServerSecurityGroup" 
 	    }
           },
           {
@@ -2640,6 +2640,14 @@
             "SourceSecurityGroupId" : {
 		"Ref" : "RabbitMQELBSecurityGroup" 
 	    }
+          },
+          {
+            "IpProtocol":"tcp",
+            "FromPort":"0",
+            "ToPort":"65535",
+            "SourceSecurityGroupId" : {
+		"Ref" : "RabbitMQELBSecurityGroup" 
+	    }
           }
         ]
       }