Added steps to upgrade and reboot system after adding OpenStack repos

After adding the OpenStack repos, several distributions need to
upgrade additional packages and sometimes this includes the kernel.
Rebooting also guarantees that all changes will take effect.  I
attempted to cover all distributions with this patch.

Change-Id: I97fbf8f9ce3ff8a403ccbd90f1b0c38d915d9369
Closes-Bug: #1258279
Add note about windows image timezone

As per the bug report, if you don't set os_type=windows
during upload, bad things happen. This patch adds a note
that says as such.

Change-Id: I0ef2136b4d9e0af56afac62ce5aac8671e03f6cb
Closes-Bug: 1239828
Merge "Added steps to upgrade and reboot system after adding OpenStack repos"
Merge "Add note about windows image timezone"