Install Guide: Fix wrong directory for openSUSE
Install Guide: Fix wrong directory for openSUSE

It's /etc/sysconfig, update keystone install section.

Change-Id: I42031cd5c4cc61d0d0437e47e683d3477d8db076
Closes-Bug: #1463134
Backport: Kilo

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