Stop using deprecated oslo_concurrency and sql_connection config options

As per the logs:
 Option "lock_path" from group "DEFAULT" is deprecated. Use option "lock_path" from group
"oslo_concurrency".

Option "sql_connection" from group "DEFAULT" is deprecated. Use option
"connection" from group "database".

Change-Id: I2109cec07ebee916c9ce0ccd24bd9a47d8d3c688
diff --git a/lib/nova b/lib/nova
index e9e78c7..8106438 100644
--- a/lib/nova
+++ b/lib/nova
@@ -437,7 +437,7 @@
     iniset $NOVA_CONF DEFAULT s3_host "$SERVICE_HOST"
     iniset $NOVA_CONF DEFAULT s3_port "$S3_SERVICE_PORT"
     iniset $NOVA_CONF DEFAULT my_ip "$HOST_IP"
-    iniset $NOVA_CONF DEFAULT sql_connection `database_connection_url nova`
+    iniset $NOVA_CONF database connection `database_connection_url nova`
     iniset $NOVA_CONF DEFAULT instance_name_template "${INSTANCE_NAME_PREFIX}%08x"
     iniset $NOVA_CONF osapi_v3 enabled "True"
 
@@ -471,7 +471,7 @@
 
     if [ -n "$NOVA_STATE_PATH" ]; then
         iniset $NOVA_CONF DEFAULT state_path "$NOVA_STATE_PATH"
-        iniset $NOVA_CONF DEFAULT lock_path "$NOVA_STATE_PATH"
+        iniset $NOVA_CONF oslo_concurrency lock_path "$NOVA_STATE_PATH"
     fi
     if [ -n "$NOVA_INSTANCES_PATH" ]; then
         iniset $NOVA_CONF DEFAULT instances_path "$NOVA_INSTANCES_PATH"
@@ -575,7 +575,7 @@
 function init_nova_cells {
     if is_service_enabled n-cell; then
         cp $NOVA_CONF $NOVA_CELLS_CONF
-        iniset $NOVA_CELLS_CONF DEFAULT sql_connection `database_connection_url $NOVA_CELLS_DB`
+        iniset $NOVA_CELLS_CONF database connection `database_connection_url $NOVA_CELLS_DB`
         iniset $NOVA_CELLS_CONF DEFAULT rabbit_virtual_host child_cell
         iniset $NOVA_CELLS_CONF DEFAULT dhcpbridge_flagfile $NOVA_CELLS_CONF
         iniset $NOVA_CELLS_CONF cells enable True