Some users wish to override the default package provider by their own.
Tag all packages with the 'openstack' to allow mass resource attributes
override using resource collectors.
Closes-bug: #1391209
Change-Id: Idcd296c754c4c66efcbdd1672c8367ce3539b268
Signed-off-by: Gael Chamoulaud <gchamoul@redhat.com>