Fix keystone_authtoken no auth_uri config
There are a error like:
AttributeError: 'NoneType' object has no attribute 'replace'
ref link is as below:
@@ -98,6 +98,7 @@ function configure_solum() {
# Setup keystone_authtoken section
configure_auth_token_middleware $SOLUM_CONF_DIR/$SOLUM_CONF_FILE $SOLUM_USER $SOLUM_AUTH_CACHE_DIR
+ iniset $SOLUM_CONF_DIR/$SOLUM_CONF_FILE keystone_authtoken auth_uri $KEYSTONE_AUTH_URI
# configure the database.
iniset $SOLUM_CONF_DIR/$SOLUM_CONF_FILE database connection `database_connection_url solum`
