test: mark last zmq block before rpc calls

lib/services/bitcoind.js

@@ -242,7 +242,6 @@ Bitcoin.prototype._zmqBlockHandler = function(node, message) {
           return log.error(err);
         }
         self.height = response.result.height;
-        self.zmqLastBlock = new Date();
         $.checkState(self.height >= 0);
         self.emit('tip', self.height);
       });
@@ -261,6 +260,7 @@ Bitcoin.prototype._zmqBlockHandler = function(node, message) {
   // Prevent a rapid succession of updates with regtest
   if (self.node.network.regtestEnabled) {
     if (new Date() - self.zmqLastBlock > 1000) {
+      self.zmqLastBlock = new Date();
       updateChain();
     } else {
       clearTimeout(self.zmqUpdateTipTimeout);