Make the cryo sleepers open job slots

[Mordrehel]

CM Version (alpha or Regular):
Either, I don't care

Summary (a quick, 2-3 sentence summary):
After a certain amount of time spent in a spawn cryo sleeper delete the character and open whatever their jobslot is.

Benefits (How this will benefit the server and game as a whole):
On a long round we wouldn't be left without commanders medics MPs.... etc.

Details (Description of how you think this would work, the benefits, etc):
As per benefits and Summary

Implementation (Optional, if you have an idea how to implement it):
Write it into the code.

[Infernus]

Added.