[install-guide] move call of heat-keystone-setup-domain
[install-guide] move call of heat-keystone-setup-domain

Prior to calling heat-keystone-setup-domain it is necessary to install
the command and to prepare the heat.conf configuration file.

Partially implements bp installguide-kilo.

Change-Id: I5248cad0f778ebec3c71eae2a8446dff8b69c0dc

AlekhyaMallina-Vedams/openstack-manuals,Akasurde/openstack-manuals,potsmaster/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,gongysh2004/openstack-manual,kairoaraujo/openstack-manuals,Akasurde/openstack-manuals,gongysh2004/openstack-manual,saeki-masaki/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,potsmaster/openstack-manuals,kairoaraujo/openstack-manuals,openstack/openstack-manuals,saeki-masaki/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals