Support for bearer token authentication

[Tolsto]

CodeFresh.io seems to only support token authentication for their hosted ChartMuseum installation. Would you accept a PR that adds a bearer token authentication mechanism to the source-controller?

[blurpy]

Would love to see this implemented. Need this for repository based access tokens in Bitbucket.

[stefanprodan]

This is not fixed, @blurpy added bearer token authentication for Git not Helm HTTP/S repos.