Use correct WSGI dir on SUSE distros

The current default (/var/www) leads to:

AH01797: client denied by server configuration:
/var/www/keystone/admin

For /var/www the needed permissions on SUSE are not set.
For /srv/www/htdocs/ the permissions are correct on SUSE systems.

Change-Id: I3f2df896daecdfe510d45ff121af2a8433a4d5be

Author: toabctl

lib/keystone

@@ -38,7 +38,11 @@ KEYSTONE_CONF_DIR=${KEYSTONE_CONF_DIR:-/etc/keystone}
 KEYSTONE_CONF=$KEYSTONE_CONF_DIR/keystone.conf
 KEYSTONE_PASTE_INI=${KEYSTONE_PASTE_INI:-$KEYSTONE_CONF_DIR/keystone-paste.ini}
 KEYSTONE_AUTH_CACHE_DIR=${KEYSTONE_AUTH_CACHE_DIR:-/var/cache/keystone}
-KEYSTONE_WSGI_DIR=${KEYSTONE_WSGI_DIR:-/var/www/keystone}
+if is_suse; then
+    KEYSTONE_WSGI_DIR=${KEYSTONE_WSGI_DIR:-/srv/www/htdocs/keystone}
+else
+    KEYSTONE_WSGI_DIR=${KEYSTONE_WSGI_DIR:-/var/www/keystone}
+fi
 
 KEYSTONEMIDDLEWARE_DIR=$DEST/keystonemiddleware
 KEYSTONECLIENT_DIR=$DEST/python-keystoneclient