Unable to set lambda to use unreserved concurrency in chalice config.

[juls858]

Setting this "reserved_concurrency": null,

results in the lambda applying the reserved_concurrency setting at the project level when applying lambda specific configurations.

If I have this set to 1 at the project level, setting to null for a specific lambda results in 1 as the actual setting. It appears there is no way to specify "use unreserved concurrency" when configuring using chalice config.json.