Flag submission service

[cypherean]

The competing teams will fetch the flag from the vulnerable services of other teams and submit the flag retrieved. This flag will be updated once every five minutes. The flag is updated in both our database, and the service of every team. This service gets the flag submitted by a team and validates it against the flag in our database. Summing it up the job of flag submission service is:

1. Ticker: Triggers flag generator, getter and setter every five minutes
2. Flag generator: Generates a new flag, stores it in db and triggers flag setter.
3. Submitter: Gets the flag from teams and validates it
4. Appends the score