Define coherent safe default for package state
Define coherent safe default for package state

Instead of overriding this value everywhere, it's easier to
define it from the start to the value we want. In this case,
we want to define it to "present", while still being
overridable.

Change-Id: I81e4fe25b2871600cac30476d021402deb359ae7

openstack/openstack-ansible-openstack_hosts,openstack/openstack-ansible-openstack_hosts