helper for aws describe-instances

{Monitoring {State disabled} PublicDnsName null RootDeviceType ebs State {Code 80 Name stopped} EbsOptimized false LaunchTime 2014-11-07T09:56:47.000Z PrivateIpAddress 172.31.200.188 ProductCodes {} VpcId vpc-1bcf0b7e StateTransitionReason {User initiated (2014-11-07 10:49:21 GMT)} InstanceId i-c1043682 ImageId ami-16f95761 PrivateDnsName ip-172-31-200-188.eu-west-1.compute.internal SecurityGroups {{GroupName MLA_DEV_SG GroupId sg-40a81a25}} ClientToken WJTLi1414511288208 SubnetId subnet-8efa2ef9 InstanceType t2.medium NetworkInterfaces {{Status in-use MacAddress 06:11:0d:4b:9f:1f SourceDestCheck true VpcId vpc-1bcf0b7e Description {Primary network interface} NetworkInterfaceId eni-ea91be9d PrivateIpAddresses {{PrivateDnsName ip-172-31-200-188.eu-west-1.compute.internal Primary true PrivateIpAddress 172.31.200.188} {PrivateDnsName ip-172-31-200-29.eu-west-1.compute.internal Primary false PrivateIpAddress 172.31.200.29} {PrivateDnsName ip-172-31-200-28.eu-west-1.compute.internal Primary false PrivateIpAddress 172.31.200.28}} PrivateDnsName ip-172-31-200-188.eu-west-1.compute.internal Attachment {Status attached DeviceIndex 0 DeleteOnTermination true AttachmentId eni-attach-51664210 AttachTime 2014-10-28T15:48:08.000Z} Groups {{GroupName MLA_DEV_SG GroupId sg-40a81a25}} SubnetId subnet-8efa2ef9 OwnerId 628603317022 PrivateIpAddress 172.31.200.188}} SourceDestCheck true Placement {Tenancy default GroupName null AvailabilityZone eu-west-1a} Hypervisor xen BlockDeviceMappings {{DeviceName /dev/xvda Ebs {Status attached DeleteOnTermination true VolumeId vol-1a8cb111 AttachTime 2014-10-28T15:48:11.000Z}}} Architecture x86_64 StateReason {Message {Client.UserInitiatedShutdown: User initiated shutdown} Code Client.UserInitiatedShutdown} RootDeviceName /dev/xvda VirtualizationType hvm Tags {{Value Alistair Key Name} {Value {start stop} Key aws_conductor}} AmiLaunchIndex 0}