Use an anonymous ISafeRunnable class instead of nested class with
instance. The removed class held an Event instance in a field which was
not released until the next event was processed. By this change this
leak is avoided.

Change-Id: If6b268f44fab79b38dd65b5a474cf9a3e994d008
Signed-off-by: Karsten Thoms <karsten.thoms@karakun.com>