Marathon that starts with a space causes parsing errors.

[sybrandy]

Hello,

Unfortunately, I don't have the exact error message any more, but if you prefix a marathon label name with a space, a parsing error occurs. This caused the Marathon provider to not load the configuration and prevented all of our services that exist in Marathon from being accessible via Traefik.

I see this being handled in two ways:

1. If a parsing error does occur, perhaps only prevent the service that has the incorrectly formatted label name from being exposed vs. not exposing all of the services.
2. Fix the parsing error by trimming whitespace from the names.

The former probably should be done regardless of the latter.

Thanks.

[sybrandy]

Thanks.