* Move remove-extra-packages to post-install since finalise.d
is running on the final image and the DIB documentation
recommends avoiding unnecessary actions there.
* Remove a few packages that used to be removed only for Fedora;
do not try to remove those that aren't on the cloud image.
* Do all uninstallations in pre-install phase, so that it doesn't try
to remove dependencies of already installed packages.
* Exclude more locale files from the image.
* Exclude the content of /var/log.
Change-Id: Idb7819b1d783f4f5f390cc7621019d3be2fa576f
Copies "ironic-agent" element from DIB and addition
of a new bash script to build the image using DIB.
Change-Id: If392f793ed1b5d902b541fe89299648fae16e427
Task: 30072
Story: 2005114