Add an asynchronous API for spot instance creation.
Add an asynchronous API for spot instance creation.

    Laniakea.create_spot_requests()
    Laniakea.check_spot_requests()
    Laniakea.cancel_spot_requests()

nth10sd/laniakea,MozillaSecurity/laniakea,MozillaSecurity/laniakea,nth10sd/laniakea