[packer v1.3.1 sync] builder/Amazon add prop block_duration_minutes

[mayn]

packer v1.3.1 feature sync
add support for:

1. https://www.packer.io/docs/builders/amazon-instance.html#block_duration_minutes
2. https://www.packer.io/docs/builders/amazon-ebsvolume.html#block_duration_minutes
3. https://www.packer.io/docs/builders/amazon-ebssurrogate.html#block_duration_minutes
4. https://www.packer.io/docs/builders/amazon-ebs.html#block_duration_minutes