Add PowerAuthGroups: users in these unix groups get admin access

[sjmudd]

This simplifies the configuration and avoiding the need to have to explicitly name all PowerAuthUsers. If the authenticated user is in the given list of groups then they will be given "admin" / write access.

So you can change what may be a large list of

  "PowerAuthUsers": ["usera", "userb", "userc", "...", "userz", "api_user1", "api_user2" ],

with something like

  "PowerAuthGroups": [ "orchestrator_users_group", "orchestrator_api_users_group" ],

That is put the user in the right unix group and orchestrator will be happy. Note: this does assume that you are using something like nginx to provide the authentication service etc.

• contributed code is using same conventions as original code
• code is formatted via gofmt (please avoid goimports)
• code is built via ./build.sh

[shlomi-noach]

Thank you -- this looks real good. Would you mind moving this away from the http package and into the os package?

[sjmudd]

ok, will do.

[sjmudd]

So moved the files as requested to os, and fixed a small issue noted with go vet / golint.

[sjmudd]

Thanks for the fast response.