Enable steady-state simulation

[PavelBal]

Depends on https://github.com/Open-Systems-Pharmacology/OSPSuite-R/issues/1016

https://github.com/Open-Systems-Pharmacology/OSPSuite-R/issues/1029

Lots of code is commented out. These two issues should be implemented first, as workarounds are too painfull to implement.

And always check for NaNs

https://github.com/Open-Systems-Pharmacology/OSPSuite-R/issues/1150

Also enable piTest_2

[PavelBal]

• Uncomment the fields simulateSteadyState and steadyStateTime in the PIConfiguration class.

[PavelBal]

https://github.com/Open-Systems-Pharmacology/OSPSuite.ParameterIdentification/issues/84