Performs a state-transition action on the system.
author: Matt Albrecht groboclown@users.sourceforge.net version: $Date: 2003/02/10 22:52:26 $ since: June 13, 2002
Execute a transition action on system, registering any
encountered errors in errors.
Parameters: system - the system-under-test's current state. Parameters: errors - container allowing registration of errors or warnings.