Add a missing password prompt for Demo user in an example
Add a missing password prompt for Demo user in an example

A password prompt was missing from the last example in this section;
this patch adds the required text.

Change-Id: Ic69ace7e2998a9584c44c7a37502b1c3e0a846e6
Closes-bug: #1464337
Backport: Kilo

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