Fix baremetal doc indentation
Fix baremetal doc indentation

The external doc section wasn't indented properly, which caused it to
be included in the internal docs, causing confusion.

Change-Id: If731a14c0d28d016ef033319fc322b3f5dafcdce

dmsimard/instack-undercloud,dpkshetty/instack-undercloud,eprasad/instack-undercloud,bcrochet/instack-undercloud,dpkshetty/instack-undercloud,rdo-management/instack-undercloud,rdo-management/instack-undercloud,eprasad/instack-undercloud,dmsimard/instack-undercloud,bcrochet/instack-undercloud