beejeebus

when running the examples/d2-quickstart client code, the client only runs once then fails. looks like the "comment" key needs to be handled better: ``` json "trafficProportion" : { "comment" :...

When `docker login private-registry.example.com` is called in parallel, some of the calls fail with the error `The specified item already exists in the keychain.` Assuming a docker config with `osxkeychain`:...

When `docker login` is called in parallel, some of the calls fail with the error `The specified item already exists in the keychain`. This PR checks for this specific error...