Task #3878: Add correct parsing of key for parmexportcal to the colibrator pipeline

CEP/Pipeline/recipes/sip/bin/msss_calibrator_pipeline.py

@@ -289,8 +289,9 @@ class msss_calibrator_pipeline(control):
         #    Swapping outliers in the gains with the median 
         # Export the calibration solutions using gainoutliercorrection and store
         # the results in the files specified in the instrument mapfile.
-        export_instrument_model = eval(py_parset.getString(
-            'Calibration.export_instrument_model'))
+        export_instrument_model = py_parset.getBool(
+            'Calibration.exportCalibrationParameters', False)
+
         with duration(self, "gainoutliercorrection"):
             self.run_task("gainoutliercorrection",
                       (parmdb_mapfile, instrument_mapfile),