Avoid usage of custom os_package_type fact
Avoid usage of custom os_package_type fact

Currently the os_package_type fact is used to distinguish Ubuntu and
Debian but it's redundant and built-in $::operatingsystem should be
enough. What is worse the custom fact is not injected while composing
facts data in unit tests and has never been tested properly.

Change-Id: I98295588b5791becb2fc464d4a15ec9cb45207e4

openstack/puppet-ironic,openstack/puppet-ironic,openstack/puppet-ironic