Start values not taken from modelDescription.xml

[Marcus Walther]

The start values that are written in the modelDescription.xml are not passed to the FMU before initialization.

How to reproduce:

• take the bouncing-ball model from testsuite/openmodelica/fmi/ModelExchange/1.0 and export it to FMU 1.0 (either with C or C++ Runtime)
• the initial height of the ball is "1.0"
• change the start-value in the modelDescription.xml to "2.0" and repack the FMU
• if you now simulate it again, the height still starts at "1.0"

If I understand the FMI Standard correctly, than the start-values should be taken from the modelDescription.xml and passed to the FMU before the initial system is solved. I know that we are using the FMI-Library to import these stuff and it seems that the library is not passing the start-values if we just call "fmi1_import_instantiate_model" and "fmi1_import_initialize".

[Adeel Asghar]

Willi, if you update the dumpVariable function to handle the case when variable has no variability/causality then you don't need to change anything else. And it will fix things for both FMI 1 & 2.