message: Fix properties not being passed in doctest_discover_tests
diff: @@ -105,8 +105,8 @@ foreach(line ${output})
  "${prefix}${test}${suffix}"
  PROPERTIES
  WORKING_DIRECTORY "${TEST_WORKING_DIR}"
  - LABELS ${labels}
  ${properties}
  + LABELS ${labels}
  )
  unset(labels)
  list(APPEND tests "${prefix}${test}${suffix}")
  