+++ This bug was initially created as a clone of Bug #1847993 +++

Description of problem:
Sometimes the migration fails while EnsureLabelsDeleted phase because of a problem updating the replicationcontroller resource information.

If the migration is run again, the migration will end successfully.


Version-Release number of selected component (if applicable):
CAM 1.2.2 
SOURCE CLUSTER: OCP 3.11 AWS
TARGET CLUSTER: OCP 4.4 AWS
NOOBAA BUCKET

How reproducible:
Intermittent

Steps to Reproduce:
1. The problem happened while migrating a mysql DeploymentConfig. I attach the jinja2 template that we use to deploy this application, but it should happen with any DC when a race condition happens.

Actual results:
The migration fails in EnsureLabelsDeleted stage, and the MigMigration resource shows this failure

status:
  conditions:
  - category: Advisory
    durable: true
    lastTransitionTime: "2020-06-17T12:54:49Z"
    message: 'The migration has failed.  See: Errors.'
    reason: EnsureLabelsDeleted
    status: "True"
    type: Failed
  errors:
  - 'Operation cannot be fulfilled on replicationcontrollers "mysql-1": the object
    has been modified; please apply your changes to the latest version and try again'
  itenerary: Failed


If the migration is run again, the migration will end successfully.


Expected results:
The migration should end without problems.

Additional info:

Full MigMigration resource:

apiVersion: migration.openshift.io/v1alpha1
kind: MigMigration
metadata:
  annotations:
    openshift.io/touch: baced36f-b099-11ea-8cbd-0a580a820268
  creationTimestamp: "2020-06-17T12:50:26Z"
  generation: 30
  labels:
    controller-tools.k8s.io: "1.0"
  name: ocp-28967-migplan-naming-mig-1592398188
  namespace: openshift-migration
  ownerReferences:
  - apiVersion: migration.openshift.io/v1alpha1
    kind: MigPlan
    name: ocp-28967-migplan-naming.migplan.1592398188
    uid: 2aeb54f6-8389-4fd3-9fa8-468135f57f5b
  resourceVersion: "117389"
  selfLink: /apis/migration.openshift.io/v1alpha1/namespaces/openshift-migration/migmigrations/ocp-28967-migplan-naming-mig-1592398188
  uid: 1204a4ca-e660-4f5d-90ff-95418a197aea
spec:
  migPlanRef:
    name: ocp-28967-migplan-naming.migplan.1592398188
    namespace: openshift-migration
  stage: false
status:
  conditions:
  - category: Advisory
    durable: true
    lastTransitionTime: "2020-06-17T12:54:49Z"
    message: 'The migration has failed.  See: Errors.'
    reason: EnsureLabelsDeleted
    status: "True"
    type: Failed
  errors:
  - 'Operation cannot be fulfilled on replicationcontrollers "mysql-1": the object
    has been modified; please apply your changes to the latest version and try again'
  itenerary: Failed
  observedDigest: d67b950bb9516f04ae2a6bdf60b0c8e70aea4ef3e52bf63f7278cd1826fa075a
  phase: Completed
  startTimestamp: "2020-06-17T12:50:26Z"

--- Additional comment from Sergio on 2020-06-17 14:06:02 UTC ---



--- Additional comment from Sergio on 2020-06-17 14:06:33 UTC ---



--- Additional comment from Sergio on 2020-06-17 14:06:58 UTC ---



--- Additional comment from Sergio on 2020-06-17 14:07:19 UTC ---