Reduce pylint warnings. Refs #10945

...k/PythonInterface/plugins/algorithms/BASISReduction311.py

...rface/plugins/algorithms/CalibrateRectangularDetectors.py

.../PythonInterface/plugins/algorithms/CheckForSampleLogs.py

...Framework/PythonInterface/plugins/algorithms/DSFinterp.py

...rk/PythonInterface/plugins/algorithms/DakotaChiSquared.py

...ork/PythonInterface/plugins/algorithms/EnginXCalibrate.py

...PythonInterface/plugins/algorithms/EnginXCalibrateFull.py

...work/PythonInterface/plugins/algorithms/EnginXFitPeaks.py

...amework/PythonInterface/plugins/algorithms/EnginXFocus.py

...nInterface/plugins/algorithms/ExaminePowderDiffProfile.py

...PythonInterface/plugins/algorithms/ExportExperimentLog.py

...Interface/plugins/algorithms/ExportSampleLogsToCSVFile.py

...honInterface/plugins/algorithms/FindReflectometryLines.py

...rk/PythonInterface/plugins/algorithms/LoadFullprofFile.py

...mework/PythonInterface/plugins/algorithms/LoadSINQFile.py

...amework/PythonInterface/plugins/algorithms/LoadVesuvio.py

...d/Framework/PythonInterface/plugins/algorithms/MaskBTP.py

...honInterface/plugins/algorithms/MaskWorkspaceToCalFile.py

...ework/PythonInterface/plugins/algorithms/MergeCalFiles.py

...erface/plugins/algorithms/PDDetermineCharacterizations.py