Merge pull request #24426 from pwittrock/flaky

Automatic merge from submit-queue

Incremental improvements to kubelet e2e tests

- Add keep-alive to ssh connection
- Don't try to stop services on image-based runs
- Increase jenkins ci timeout to 90 minutes to accomadate unpredictable go build times
- Remove spammy log statement

hack/jenkins/job-configs/kubernetes-jenkins/node-e2e.yaml

@@ -93,7 +93,7 @@
         - ansicolor:
             colormap: xterm
         - timeout:
-            timeout: 45
+            timeout: 90
             fail: true
         - timestamps
         - inject: