Remove ConsoleTextArea dependency from ModelExp

[lufe089]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Feature request
[ ] Documentation issue or request
[x ] Improvement request
[ ] Support request => Please do not submit support request here

Current behavior

The ModelExpression requires SWI component to show exception messages

Expected behavior

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Change the method createExpression to throw a Functional or techcnical exception if any exception is detected instead of write the exception directly in console. Modify the user GUI classes to show exceptions messages in the ConsoleTextArea
Apply the same fix in the following classes:
OverTwoElementsExpressionSet
ModelExpr2HLCL
SolverOpersTask
SolverTasks
ModelExpr

Environment

Variamos version: 1.2.0.1

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