Parameter evaluation for simpler initial equation systems (OpenIPSL#369)

* Evaluate parameter to simplify initial equation systems.

This fixes the following tests in System Modeler:
OpenIPSLTest-master/regression/Tests/Controls/PSSE/ES/ESST4B
OpenIPSLTest-master/regression/Tests/Controls/PSSE/ES/EXST1
OpenIPSLTest-master/examples/DAEMode/SMIB_Examples/Example_1/Network3

* Evaluate parameter to simplify initial equation systems.

This fixes the following tests in System Modeler:
OpenIPSLTest-master/examples/RaPIdExperiments/Mostar
OpenIPSLTest-master/regression/Tests/Controls/PSSE/ES/ST5B
OpenIPSLTest-master/examples/SevenBus/Network

Author: maltelenz

OpenIPSL/NonElectrical/Continuous/SimpleLag.mo

@@ -5,7 +5,7 @@ block SimpleLag "First order lag transfer function block"
     annotation (Placement(transformation(extent={{-58,32},{-38,52}})));
   Real state(start=y_start);
   parameter Real K "Gain";
-  parameter Types.Time T "Lag time constant";
+  parameter Types.Time T "Lag time constant" annotation(Evaluate = true);
   parameter Real y_start "Output start value";
 protected
   parameter Real T_mod=if T < Modelica.Constants.eps then 1000 else T;

OpenIPSL/NonElectrical/Continuous/SimpleLagLimVar.mo

@@ -15,7 +15,7 @@ block SimpleLagLimVar
   Modelica.Blocks.Sources.RealExpression const(y=T)
     annotation (Placement(transformation(extent={{-58,32},{-38,52}})));
   parameter Real K "Gain";
-  parameter Types.Time T "Lag time constant";
+  parameter Types.Time T "Lag time constant" annotation(Evaluate = true);
   parameter Real y_start "Output start value";
   parameter Real T_mod=if T < Modelica.Constants.eps then 1000 else T;
   Real state;