Comment 9 for bug 1096013

Reviewed: https://review.openstack.org/23645
Committed: http://github.com/openstack/heat/commit/cfcaa895a6357a4bc08ce84928541f2d80c5b0e7
Submitter: Jenkins
Branch: master

commit cfcaa895a6357a4bc08ce84928541f2d80c5b0e7
Author: Steve Baker <email address hidden>
Date: Wed Mar 6 15:29:12 2013 +1300

    Allow instance NetworkInterfaces to be list of str or dict

    It should be possible to specify NetworkInterfaces of an instance either
    as an array of strings or as an array of dicts.

    The following should now be possible:
    This will define nics in the order specified by DeviceIndex
    "NetworkInterfaces" : [
      { "NetworkInterfaceId" : {"Ref" : "controlXface"}, "DeviceIndex" : "0" },
      { "NetworkInterfaceId" : {"Ref" : "controlXface2"}, "DeviceIndex" : "1" },
    ],

    This will define nics in the order specified by list position
    "NetworkInterfaces" : [{"Ref" : "controlXface"}, {"Ref" : "controlXface2"}],

    Mixing the 2 forms is supported but the resulting order is not defined.

    Amazon documentation is ambigious about which form is actually supported
    http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-instance.html#cfn-ec2-instance-networkinterfaces
    http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/quickref-ec2.html#cfn-template-snippets-eni
    Fixes: Bug #1096013

    Change-Id: Id387d2e750cbe533a9b8a1fedc49d5bcf690fbcf