Update parsers.py

[garrythezany]

Hello again!

If the container-labels for a single service are omitted, the deck-chores service fails and dies:

[...]
    labels:
       deck-chores.command: "echo hello"
       deck-chores.interval: "hourly"
[...]

The trailing commit fixes the service failing on misconfigured/broken job label definitions,
and prints an error instead.

Sorry for missing / failing tests.

Thanks!

[funkyfuture]

sorry, but this certainly requires tests. i'm also having trouble to understand what your description and example have to do with the proposed change.

[Sadrak]

A new coworker missspelled the label (forgot the naming part) and the parser broke the hole deck-chores container. The container fainted with a python split/parse error.

[...]
    labels:
       deck-chores.command: "echo hello"
       deck-chores.interval: "hourly"
[...]

VS

[...]
    labels:
       deck-chores.name-for-cron.command: "echo hello"
       deck-chores.name-for-cron.interval: "hourly"
[...]