Fix client initiation of multiple reconnect ops

If the client queue was enabled and requests were made during the
reconnect process (but after one unsuccessful connection attempt), they
would spawn concurrent reconnection attempts.

lib/client/client.js

@@ -939,9 +939,9 @@ Client.prototype._connect = function _connect() {
       return;
     }
     connectSocket(function (err) {
-      self.connecting = false;
       if (!err) {
         postSetup();
+        self.connecting = false;
         self.connected = true;
         self.emit('connect', socket);
         self.log.debug('connected after %d attempt(s)', num+1);