Use DATABASE/connection opt for db url in Savanna

DATABASE/sql_connection opt is now deprecated.

Change-Id: I58058f0d51e16de53e6472c8c01065438d709edc
diff --git a/lib/savanna b/lib/savanna
index bb4dfe6..57d8ac3 100644
--- a/lib/savanna
+++ b/lib/savanna
@@ -96,8 +96,7 @@
     iniset $SAVANNA_CONF_DIR/$SAVANNA_CONF_FILE DEFAULT debug $SAVANNA_DEBUG
 
     recreate_database savanna utf8
-    iniset $SAVANNA_CONF_DIR/$SAVANNA_CONF_FILE database sql_connection `database_connection_url savanna`
-    inicomment $SAVANNA_CONF_DIR/$SAVANNA_CONF_FILE database connection
+    iniset $SAVANNA_CONF_DIR/$SAVANNA_CONF_FILE database connection `database_connection_url savanna`
 
     if is_service_enabled neutron; then
         iniset $SAVANNA_CONF_DIR/$SAVANNA_CONF_FILE DEFAULT use_neutron true