message: Fixed used container name
diff: @@ -919,7 +919,7 @@ def getChecksumfileFromImage(String dockerTag, String checksumfile) {
  sh (
  script: """
  docker run --name tmpContainer -dit ${dockerTag} /bin/sh
  - docker cp ${dockerTag}:/filesToUpload/${checksumfile} ${checksumfile}
  + docker cp tmpContainer:/filesToUpload/${checksumfile} ${checksumfile}
  docker stop tmpContainer
  docker rm tmpContainer
  """
  