cmake ctest_sleep() examples

HDFGroup/hdf5 config/cmake/scripts/CTestScript.cmake :300 

ctest_sleep(60)

HDFGroup/hdf5 config/cmake/scripts/CTestScript.cmake :321 

ctest_sleep(60)

InsightSoftwareConsortium/ITK Modules/ThirdParty/HDF5/src/itkhdf5/config/cmake/scripts/CTestScript.cmake :300 

ctest_sleep(60)

InsightSoftwareConsortium/ITK Modules/ThirdParty/HDF5/src/itkhdf5/config/cmake/scripts/CTestScript.cmake :321 

ctest_sleep(60)

InsightSoftwareConsortium/ITK Modules/ThirdParty/NIFTI/src/nifti/cmake/nifti_common.cmake :455 

ctest_sleep(${START_TIME} 300 ${CTEST_ELAPSED_TIME})