* Added filter for private repos. Non private repos get redirected to
olympus
* Changed filter to allow private modules
* Changed config file name function
* Added filter tests
* The middleware returns 200 for privates, redirects public, 404 for
disabled repos
* Removed printf
* Removed forgotten printf
* Removed logger from the middleware func, not used anymore
* Removed unused (uncommented) function
* Replaced 404 with 403 in case of banned modules
* Fixed test path / cleaned olympus endpoint suffix
* Added error operation to GetVersion
* Moved filter test in custom file, reverted injection of the filter into
the app
* Removed white line
* Clarified comment for ignoring getversion error
* Added todo comment to fill the cache and serve the request with the
cache
* Added error handling to filter
* Removed commented early version of the test
