validate config.json by https://github.com/opencontainers/runtime-spec/tree/master/schema

[liangchenye]

https://github.com/opencontainers/runtime-spec/tree/master/schema has strong and beautiful validation function. We can use it here.

[wking]

Dup of #197?

[Mashimiao]

@liangchenye as #374 merged, can we close this issue?

[liangchenye]

close