Merge pull request #4247 from RosettaCommons/vmullig/fix_bind2nd_error
Fix MacOS/clang compilation error due to deprecated std::bind2nd().
Dropping in the following as a replacement:
```c++
//std::bind2nd( &myfxn, old_parameter );
std::bind( &myfxn, std::placeholder::_1, old_parameter );
```