Error creating userKernels.hpp file for multiple files

[wcmjunior]

When calling the compiler with multiple input files, it does not write all user kernels in userKernels.hpp. There are two main issues that must be fixed:

1. Operations' numbers must be unique even though multiple files are given as input for the compiler;
2. User kernels are being subscribed, so only the last translated input file will have its kernels succesfully recorded in this file.