Fix: SOB-38 by using Jython interpreters with isolated PySystemState() objects.

...rce/java/ch/systemsx/cisd/common/evaluator/Evaluator.java

...e/java/ch/systemsx/cisd/common/utilities/PythonUtils.java

...d/etlserver/registrator/JythonTopLevelDataSetHandler.java

...er/registrator/api/v2/JythonTopLevelDataSetHandlerV2.java

...eric/shared/api/v1/validation/ValidationScriptRunner.java

...ython/api/v1/impl/MasterDataRegistrationScriptRunner.java

...isd/openbis/dss/etl/jython/JythonPlateDataSetHandler.java