Update openstackdocstheme>=1.16.0
Update openstackdocstheme>=1.16.0

Change-Id: I0418703e786a459c0282ac55bb00a0fe2af54a70

CiscoSystems/puppet-neutron,fuel-infra/puppet-neutron,openstack/puppet-neutron,fuel-infra/puppet-neutron,CiscoSystems/puppet-neutron,openstack/puppet-neutron,CiscoSystems/puppet-neutron,fuel-infra/puppet-neutron