[code] Implement logic for include a file in FileReflection.

Add the posibility to automatically include a file if this exists and is not already included.
[code] Preserve BC
Merge pull request #4649 from Maks3w/feature/dry-filecreator

[code] Implement logic for include a file in FileReflection if this exists and is not already included
Merge branch 'hotfix/4649'

Close #4649