+++ This bug was initially created as a clone of Bug #1756461 +++

Description of problem: The ClusterVersion object in my cluster is having previously completed upgrade history modified post-upgrade such that it no longer is providing an accurate summary of upgrade history. I am seeing the timestamps on upgrades getting aligned end to end (upgrade completed time is always equal to the next upgrade's startedTime) and I know from previously looking at upgrades that this isn't accurate, and I know the values were not always like this, hence the conclusion that the history is being modified post-upgrade.


Version-Release number of selected component (if applicable): 4.1.18


How reproducible: Seems common. Rob Szumski also hit this.


Steps to Reproduce:
1. Run upgrades
2. Check Openshift UI
3. Wait
4. Do another upgrade
5. Verify even though you waited, the first upgrade's completedTime will equal the 2nd upgrades startedTime.

Actual results: Incorrect upgrade history times


Expected results: Correct upgrade history times


Additional info:

ClusterID is af8bc55b-9ae3-4735-bf65-b6ef43aeced9

You can see a snippet of my previous upgrade history in the following ticket: https://bugzilla.redhat.com/show_bug.cgi?id=1753348 

In particular, this was my latest upgrades information from the ClusterVersion history list 4.1.16. Pay attention to completionTime.

    history:
    - completionTime: "2019-09-14T01:25:04Z"
      image: quay.io/openshift-release-dev/ocp-release@sha256:61ed953962d43cae388cb3c544b4cac358d4675076c2fc0befb236209d5116f7
      startedTime: "2019-09-14T00:03:21Z"
      state: Completed
      verified: true
      version: 4.1.16


Now, look at the same information taken today from the same cluster at 4.1.18:

    history:
    - completionTime: "2019-09-25T17:22:57Z"
      image: quay.io/openshift-release-dev/ocp-release@sha256:420633acf3fc7572372fe2df758152f6ab1f53a21c79a6c4b741fa0394c7df3a
      startedTime: "2019-09-25T16:13:14Z"
      state: Completed
      verified: true
      version: 4.1.18
    - completionTime: "2019-09-25T16:13:14Z"
      image: quay.io/openshift-release-dev/ocp-release@sha256:747e0d41ee2f1af8b234e8c96c3291225a120fab3af53ae691afb4f51ce02b85
      startedTime: "2019-09-23T23:01:54Z"
      state: Completed
      verified: true
      version: 4.1.17
    - completionTime: "2019-09-23T23:01:54Z"
      image: quay.io/openshift-release-dev/ocp-release@sha256:61ed953962d43cae388cb3c544b4cac358d4675076c2fc0befb236209d5116f7
      startedTime: "2019-09-14T00:03:21Z"
      state: Completed
      verified: true
      version: 4.1.16

Notice that the version 4.1.16 completionTime was:
    - completionTime: "2019-09-14T01:25:04Z"

and the current value of that same item in the CV history list's completionTime for 4.1.16 is:
    - completionTime: "2019-09-23T23:01:54Z"


As shown, the completionTime of a previously, 2 versions ago upgrade changed.