Correct glance db_sync command

Closes-Bug: #1263431

Change-Id: I30a53adfdd8e00a9995595af2e090190bac241a0
diff --git a/lib/glance b/lib/glance
index b278796..135136d 100644
--- a/lib/glance
+++ b/lib/glance
@@ -176,7 +176,7 @@
     recreate_database glance utf8
 
     # Migrate glance database
-    $GLANCE_BIN_DIR/glance-manage db sync
+    $GLANCE_BIN_DIR/glance-manage db_sync
 
     create_glance_cache_dir
 }