Fix building on centos with gcc 4.8.5

[rkimballn1]

These changes are required to make this work on Centos.
Centos is doing things differently with the following syntax
auto scale_node{get_argument(1)};
While gcc on ubuntu sets scale_node to a shared_ptr<Node>, centos makes an initializer_list<shared_ptr<Node>>. Yet another reason to avoid the auto keyword.

[arogowie-intel]

Thanks for this fix! I saw this once on CI, however later CI passed.

[silee2]

I see the same issue with latest ICC. "auto" with C++ uniform initialization syntax does not seem to be well defined for C++11.