swagger: updated firecracker-v0.1.yaml
swagger: updated firecracker-v0.1.yaml

* make the yaml consistent (not use quotes when not needed,
  use same padding and others).
* add minimum value for guest_cid
* removed initrd_path as we don't have an implementation for that
* modified the Device State to match the api server implementation

Signed-off-by: Andreea Florescu <f68a7d732e796861f8e79ea704b43a5ee52eddaf@amazon.com>

firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker