It's a start

- Change the way we create an EC2 image
  + Previously we created an EC2 image as a flat filesystem image
    this requred some special codeing and we ended up calling mkinitrd
    from within kiwi. As mkinitrd evolved to require a live root filesystem
    and with the impending move to dracut we need to start using a kiwi
    generated initrd. Therefore, EC2 image will now be created as disk
    images just like other vmx images. We also drop the use of the
    external ec2-ami-tools. Creating abundle is relatively easy and this
    functionality requires people to add thei EC2 credentials to the config
    file. That makes it easy to accidentally share private information.
  + Remove XML elemnts ec2config and its children
    ec2accountnr, ec2certfile, ec2privatekeyfile, ec2region
  + Introduce "ec2" as a firmware option
    we need this to set the partition table to be gpt instead of msdos
  + Print an error message for format="ec2" during XML validation
    we maintain format="ec2" in the schema for now to allow us to generate
    a more sensible error message than the parser would. This is an
    incompatible schema change
  + Remove EC2 region check in Validator
  + Remove KIWIEC2Region.txt
  + Update unit tests
  + Properly pass the boottimeout setting to the initrd config
  + Remove the XMLEC2Data object and its unit tests
  + Remove special code for EC2 initrd creation calling mkinitrd