Require openstack-doc-tool 0.15
Require openstack-doc-tool 0.15

Update requirement, we need the current version

Change-Id: Idcfc2da6c2646a80eb654f71c7e6e2e346318256

dreamhost/api-site,dreamhost/api-site,Tesora/tesora-api-site,Tesora/tesora-api-site,rackerlabs/api-site,DonSchenck/api-site,dreamhost/api-site,Tesora/tesora-api-site,Tesora/tesora-api-site,openstack/api-site,rackerlabs/api-site,Tesora/tesora-api-site,dreamhost/api-site,dreamhost/api-site,rackerlabs/api-site,DonSchenck/api-site,Tesora/tesora-api-site,DonSchenck/api-site,dreamhost/api-site,dreamhost/api-site,DonSchenck/api-site,Tesora/tesora-api-site,openstack/api-site,rackerlabs/api-site,openstack/api-site,openstack/api-site,DonSchenck/api-site