Rework GCI e2e jobs

This is based on our new plan to run CI tests against every active k8s branch to
ensure that GCI will always be able to cut a release whenever k8s cuts a patch
release. Theoretically we should cover master, 1.3, 1.2 and 1.1, but since only
nodes could run on GCI back in 1.1, and 1.1 jobs used the old e2e runner, which
is hard to update now, I am skipping the 1.1 branch.

Also, move the continuous Docker validation jobs out to its own config file.

jenkins/job-configs/kubernetes-jenkins/continuous-docker-validation.yaml

@@ -0,0 +1,91 @@
+# Template for Docker continuous validation tests, running on GCI. See
+# https://github.com/kubernetes/kubernetes/issues/25215 for details of what the
+# job does.
+
+# A custom publisher that prints out critical software versions (OS, K8s, and
+# Docker) in the build history page.
+- publisher:
+    name: version-printer
+    publishers:
+        - groovy-postbuild:
+            script: |
+                def masterImageMatcher = manager.getLogMatcher("KUBE_GCE_MASTER_IMAGE=(.*)")
+                if(masterImageMatcher?.matches()) manager.addShortText("<b>Master Image: " + masterImageMatcher.group(1) + "</b>", "grey", "white", "0px", "white")
+                def k8sVersionMatcher = manager.getLogMatcher("Using\\spublished\\sversion\\s(.*)\\s\\(from.*")
+                if(k8sVersionMatcher?.matches()) manager.addShortText("<br><b>Kubernetes version: " + k8sVersionMatcher.group(1) + "</b>", "grey", "white", "0px", "white")
+                def dockerVersionMatcher = manager.getLogMatcher("KUBE_GCI_DOCKER_VERSION=(.*)")
+                if(dockerVersionMatcher?.matches()) manager.addShortText("<b>Docker Version: " + dockerVersionMatcher.group(1) + "</b>", "grey", "white", "0px", "white")
+
+
+# Template for the continuous Docker validation jobs.
+- job-template:
+    name: 'continuous-docker-validation-{os-distro}'
+    node: '{jenkins_node}'
+    triggers:
+        - timed: '@daily'
+    description: '{description} Test owner: {test-owner}.'
+    disabled: '{obj:disable_job}'
+    properties:
+        - build-discarder:
+            days-to-keep: 7
+    # Need the 8 essential kube-system pods ready before declaring cluster ready
+    # etcd-server, kube-apiserver, kube-controller-manager, kube-dns
+    # kube-scheduler, l7-default-backend, l7-lb-controller, kube-addon-manager
+    provider-env: |
+        export KUBERNETES_PROVIDER="gce"
+        export E2E_MIN_STARTUP_PODS="8"
+        export KUBE_GCE_ZONE="us-central1-f"
+        export FAIL_ON_GCP_RESOURCE_LEAK="true"
+        export CLOUDSDK_CORE_PRINT_UNHANDLED_TRACEBACKS="1"
+    wrappers:
+        - ansicolor:
+            colormap: xterm
+        - timeout:
+            timeout: '{jenkins-timeout}'
+            fail: true
+        - timestamps
+        - workspace-cleanup:
+            dirmatch: true
+            external-deletion-command: 'sudo rm -rf %s'
+    publishers:
+        - claim-build
+        - junit-publisher
+        - log-parser
+        - email-ext:
+            recipients: '{emails}'
+        - gcs-uploader
+        - description-setter:
+            regexp: KUBE_GCE_MASTER_IMAGE=(.*)
+        - version-printer
+    builders:
+        - shell: |
+            {provider-env}
+            {job-env}
+            {post-env}
+            timeout -k {kill-timeout}m {timeout}m {runner} && rc=$? || rc=$?
+            if [[ ${{rc}} -ne 0 ]]; then
+                if [[ -x kubernetes/cluster/log-dump.sh && -d _artifacts ]]; then
+                    echo "Dumping logs for any remaining nodes"
+                    ./kubernetes/cluster/log-dump.sh _artifacts
+                fi
+            fi
+            {report-rc}
+
+    # Template defaults. Can be overriden in job definitions.
+    jenkins_node: 'e2e'
+    test-owner: 'dawnchen'
+    emails: '[email protected]'
+
+- project:
+    name: continuous-docker-validation
+    os-distro:
+        - 'gci': # continuous-docker-validation-gci
+            description: 'Runs the default e2e tests with the latest Kubernetes green build, latest GCI build, and latest Docker (pre)release.'
+            timeout: 50
+            job-env: |
+                export GINKGO_TEST_ARGS="--ginkgo.skip=\[Slow\]|\[Serial\]|\[Disruptive\]|\[Flaky\]|\[Feature:.+\]"
+                export GINKGO_PARALLEL="y"
+                export PROJECT="k8s-docker-validation-gci"
+                export JENKINS_GCI_IMAGE_family="gci-preview-test"
+    jobs:
+        - 'continuous-docker-validation-{os-distro}'