Update node spec in Jenkinsfile

Signed-off-by: Anca Iordache <[email protected]>

Jenkinsfile

@@ -87,7 +87,7 @@ def buildImage(baseImage) {
 def runTests(dockerVersion, pythonVersion, baseImage) {
     return {
         stage("python=${pythonVersion} docker=${dockerVersion} ${baseImage}") {
-            node("ubuntu && amd64 && !zfs") {
+            node("ubuntu-2004 && amd64 && !zfs && cgroup1") {
                 def scmvar = checkout(scm)
                 def imageName = "dockerpinata/compose:${baseImage}-${scmvar.GIT_COMMIT}"
                 def storageDriver = sh(script: "docker info -f \'{{.Driver}}\'", returnStdout: true).trim()