Deploy command should not fallback to using System auth if user does not provide auth

You can see on the following block of code
https://github.com/apache/incubator-openwhisk-package-deploy/blob/master/packages/actions/deployWeb.js#L100

that if the user does not provide an auth string to run the deploy command with the command will default to using `process.env.__OW_AUTH_KEY`.

The auth String to use for the command should be a required property, if not provided the Action should error out and ask for an auth key.