disable heartbeats if hearbeat set to 0

Author: carlhoerberg

lib/connection.js

@@ -227,7 +227,8 @@ C.open = function(allFields, openCallback0) {
       tunedOptions.channelMax =
         negotiate(fields.channelMax, allFields.channelMax);
       tunedOptions.heartbeat =
-        negotiate(fields.heartbeat, allFields.heartbeat);
+        allFields.heartbeat === 0 ?
+        0 : negotiate(fields.heartbeat, allFields.heartbeat);
       send(defs.ConnectionTuneOk);
       send(defs.ConnectionOpen);
       expect(defs.ConnectionOpenOk, onOpenOk);