ENH: Update ExternalData_URL_TEMPLATES for sha512 resources
ENH: Update ExternalData_URL_TEMPLATES for sha512 resources

Change-Id: Id91aaba700076d243746a7d85b2585fa7f5429aa

InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples,InsightSoftwareConsortium/ITKExamples