#{:idea} Pass the spec validations step on all defined states before calling init-key.

[niwinz]

As far as I know, right now the init-key is called just after spec validation (without validating all others specs). The proposal is have an option to validate first all the config, then initialize all.

This proposal is motivated because of this case use:

• I proceed starting system, http server pases validtion and starts.
• The next pre-init-spec fails, and leaves the system in failed state.
• Now i'm unable to properly stop the jetty, and i can't restart because port is already used by the running jetty that i don't have access to. -> so I need to restart my repl process.

Validating all the specs before starting will help alot prevent this kind of situations.

[niwinz]

Closing the issue because is already open #32 (but for some reason i didn't see on my first search).