style(VTKLegacyFileReader): Improve inputFile variable name
style(VTKLegacyFileReader): Improve inputFile variable name

InsightSoftwareConsortium/ITKBridgeJavaScript,thewtex/ITKBridgeJavaScript,thewtex/ITKBridgeJavaScript,thewtex/ITKBridgeJavaScript,InsightSoftwareConsortium/ITKBridgeJavaScript,InsightSoftwareConsortium/ITKBridgeJavaScript