Google Cloud Engine metadata grain

This grain pulls data from the GCE metadata service

The grains look like the following

grains.get gce
local:
    ----------
    attributes:
        ----------
        ssh-keys:
            bjackson:ssh-rsa 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 bjackson@bjackson-mac.ecdc.edgecast.com
    cpuPlatform:
        Intel Ivy Bridge
    description:
    disks:
        |_
          ----------
          deviceName:
              instance-1
          index:
              0
          mode:
              READ_WRITE
          type:
              PERSISTENT
    hostname:
        instance-1.c.api-project-588351802217.internal
    id:
        8147584054050615698
    image:
        projects/debian-cloud/global/images/debian-9-stretch-v20171025
    licenses:
        |_
          ----------
          id:
              1000205
    machineType:
        projects/588351802217/machineTypes/f1-micro
    maintenanceEvent:
        NONE
    name:
        instance-1
    networkInterfaces:
        |_
          ----------
          accessConfigs:
              |_
                ----------
                externalIp:
                    35.192.38.174
                type:
                    ONE_TO_ONE_NAT
          forwardedIps:
          ip:
              10.240.0.2
          ipAliases:
          mac:
              42:01:0a:f0:00:02
          network:
              projects/588351802217/networks/default
          targetInstanceIps:
    preempted:
        FALSE
    scheduling:
        ----------
        automaticRestart:
            TRUE
        onHostMaintenance:
            MIGRATE
        preemptible:
            FALSE
    serviceAccounts:
        ----------
        588351802217-oe0csf2kc2f4fbp38gb33vgh0hvuc0de@developer.gserviceaccount.com:
            ----------
            aliases:
                - default
            email:
                588351802217-oe0csf2kc2f4fbp38gb33vgh0hvuc0de@developer.gserviceaccount.com
            scopes:
                - https://www.googleapis.com/auth/devstorage.read_only
                - https://www.googleapis.com/auth/logging.write
                - https://www.googleapis.com/auth/monitoring.write
                - https://www.googleapis.com/auth/servicecontrol
                - https://www.googleapis.com/auth/service.management.readonly
                - https://www.googleapis.com/auth/trace.append
        default:
            ----------
            aliases:
                - default
            email:
                588351802217-oe0csf2kc2f4fbp38gb33vgh0hvuc0de@developer.gserviceaccount.com
            scopes:
                - https://www.googleapis.com/auth/devstorage.read_only
                - https://www.googleapis.com/auth/logging.write
                - https://www.googleapis.com/auth/monitoring.write
                - https://www.googleapis.com/auth/servicecontrol
                - https://www.googleapis.com/auth/service.management.readonly
                - https://www.googleapis.com/auth/trace.append
    tags:
    virtualClock:
        ----------
        driftToken:
            0
    zone:
        projects/588351802217/zones/us-central1-f