Rename update_user() as an internal method
Rename update_user() as an internal method

update_user() was used in record_processor module only, so that should
be considered as an internal method. This patch renames it.

Change-Id: I11ec5baab9e89270a593c2aa8eb32318135b28b9

openstack/stackalytics,0xf2/stackalytics,0xf2/stackalytics,stackforge/stackalytics,stackforge/stackalytics,0xf2/stackalytics,openstack/stackalytics,stackforge/stackalytics,openstack/stackalytics,0xf2/stackalytics,openstack/stackalytics