Add datastore.complete_indexing() func.

sugar/datastore/datastore.py

@@ -249,5 +249,8 @@ def unmount(mount_point_id):
 def mounts():
     return dbus_helpers.mounts()
 
+def complete_indexing():
+    return dbus_helpers.complete_indexing()
+
 def get_unique_values(key):
     return dbus_helpers.get_unique_values(key)

sugar/datastore/dbus_helpers.py

@@ -88,3 +88,6 @@ def mounts():
 def get_unique_values(key):
     return _get_data_store().get_uniquevaluesfor(key, dbus.Dictionary({}, signature='ss'))
 
+def complete_indexing():
+    return _get_data_store().complete_indexing()
+