Do not use OS specific path separators for intern config

[agubler]

Type: bug

The following has been addressed in the PR:

• [x] There is a related issue
• [x] All code has been formatted with prettier as per the readme code style guidelines
• [x] Unit or Functional tests are included in the PR

Description:

Intern reporters do not require OS specific separators for file paths. Tested on MacOs and Windows VM (win10).

Related to #123