Replace all the .catch() by try/catch

Because .catch() breaks the stack trace, this avoid us to deeply understand the cause of an error.

Example:

    return co(function*() {
      yield server.initWithDAL();
      yield configure(server, server.conf || {});
      yield server.loadConf();
      cbArgs.length--;
      cbArgs[cbArgs.length++] = server;
      cbArgs[cbArgs.length++] = server.conf;
      onService && onService(server);
      return callback.apply(that, cbArgs);
    })
      .catch(function (err) {
        server.disconnect();
        throw Error(err);
      });

Should be replaced by:

    return co(function*() {
      try {
        yield server.initWithDAL();
        yield configure(server, server.conf || {});
        yield server.loadConf();
        cbArgs.length--;
        cbArgs[cbArgs.length++] = server;
        cbArgs[cbArgs.length++] = server.conf;
        onService && onService(server);
        return callback.apply(that, cbArgs);
      } catch (e) {
        server.disconnect();
        throw e;
      }
    });