Fix exi schema factory exception handler

[dportnrj]

There is getStackTrace() in https://github.com/SwitchEV/RISE-V2G/blob/master/RISE-V2G-Shared/src/main/java/com/v2gclarity/risev2g/shared/exiCodec/EXISchemaFactoryExceptionHandler.java

@Override
public void fatalError(EXISchemaFactoryException eXISchemaFactoryException) throws EXISchemaFactoryException {
    logger.warn("FATAL:");
    eXISchemaFactoryException.getStackTrace();
}

instead of printStackTrace() as in error method for example:

@Override
public void error(EXISchemaFactoryException eXISchemaFactoryException) throws EXISchemaFactoryException {
    logger.warn("ERROR:");
    eXISchemaFactoryException.printStackTrace();
}