Add options for instance resizing

This patch adds parameterization for three options that are useful
when resizing instances:
* The allow_resize_to_same_host flag allows the source and destination
  hosts to be the same.
* The scheduler_default_filters flag allows users to specify
  nova-scheduler filters.
* The resize_confirm_window flag allows users to have nova
  automatically confirm resizes after some amount of time.

Change-Id: Ib84aa54a5c592fbf9672e34352afbcc95089dd36
Closes-Bug: #1310708
Conversion script skipping first in list

A bug in the conversion script from SNT to hiera
mappings was causing the first element of in a list
of mappings to be skipped. This patch corrects the issue.

Change-Id: Icf83704e712ab1e700ec667635966b2d7c4eda8d
Merge "Conversion script skipping first in list"
Merge "Add options for instance resizing"
Merge remote-tracking branch 'upstream/master' into icehouse