SDD: Adjust AirSys:ClgCtrl

Now single zone systems (those that should use
SetpointManagerSingleZoneReheat) are defind by AirSys:ClgCtrl =
NoSATControl.  Previously these systems were defined using Fixed ClgCtrl
and system type SZAC or SZHP.  In short now the SDD defines exactly what
type of control (setpoint manager) you get instead of expert logic based
on system type.  Except for the exception SZVAV where control logic is
still based on the system type flag.