We need this to be able to make decision of what style of package we are
working with: Debian style package (for example, it uses a
nova-consoleproxy package and not nova-novncproxy, or it has a
openstack-dashboard-apache, etc.), or just the Ubuntu style package.
This is needed, because in some cases, we are using the Debian style
packages but running under Ubuntu. For example, that's the case when
running with MOS over Ubuntu. For this case, a manual override is
provided, in the form of a /etc/facter/facts.d/os_package_type.txt
containing:
os_package_type=debian
In all other cases, we can consider that we're using vanilia (ie:
unmodified) distribution packages, and we can set $::os_package_type
depending on the value of $::operatingsystem.
Having the below snipets helps simplifying checks within individual
project manifests, so that we can just reuse $::os_package_type
directly without having to also check if it contains a value, then
check for the content of $::operatingsystem (ie: what's below factors
the check once and for all).
Change-Id: I0a009c0a60062d40c558c1f8de95386ce253f930