Deployer allows generation of illegal marathon IDs

[pegelston]

The deployer allows generation of illegal marathon service IDs which causes stream deployment to fail.

Expected Behavior

A stream using a label with capital letters should successfully deploy.

Current Behavior

A stream using a label with capital letters fails to deploy in marathon.

Steps to Reproduce

1. Create a new stream in SCDF
2. Create a label for each stream app and use capital letters, e.g. TIME: time | LOG: log
3. Deploy the stream

Possible Solution

The deployer should sanitize the service IDs for use in marathon deployment.

Digging in, it seems that marathon restricts service IDs to the following characters:

• digits (0-9), dashes (-)
• dots (.)
• lowercase letters (a-z)
• slashes (/)