Description of problem:
When there are pods in a namespace that is going to be migrated, MTC shows a warning in the migplan. This warning tells the user to look for further information in "unhealthyNamespaces", but this field does not exist in the migplan. The right field name is "namespaces"

Version-Release number of selected component (if applicable):
MTC 1.4.0

How reproducible:
Always

Steps to Reproduce:
1. Create a namespace in source cluster

oc new-project bz-test

2. Create an unhealthy pod in this namespace

cat << EOF | oc create -f -
apiVersion: v1
kind: Pod
metadata:
  name: pod-test
  namespace: bz-test
spec:
  containers:
  - name: podtest
    image: alpine
    command: [ "/bin/sh", "-c", "--" ]
    args: [ "wrongcommand" ]
EOF


3. Create a migration plan for this namespace

Actual results:
A warning like this one is shown in the migplan resource

    - category: Warn
      lastTransitionTime: "2021-01-12T09:49:16Z"
      message: 'Source namespace(s) contain unhealthy pods. See: `unhealthyNamespaces`
        for details.'
      reason: NotHealthy
      status: "True"
      type: SourcePodsNotHealthy


But there is no field with name "unhealthyNamespaces", the field where we need to look for the information regarding the unhealthy resources is actually "namespaces":

    namespaces:
    - name: bz-test
      workloads:
      - name: Pods
        resources:
        - pod-test


Expected results:
The warning should point to the right field name.


Additional info:

Full migplan status data:

  status:
    conditions:
    - category: Warn
      lastTransitionTime: "2021-01-12T09:49:16Z"
      message: 'Source namespace(s) contain unhealthy pods. See: `unhealthyNamespaces`
        for details.'
      reason: NotHealthy
      status: "True"
      type: SourcePodsNotHealthy
    - category: Required
      lastTransitionTime: "2021-01-12T09:49:18Z"
      message: The `persistentVolumes` list has been updated with discovered PVs.
      reason: Done
      status: "True"
      type: PvsDiscovered
    - category: Required
      lastTransitionTime: "2021-01-12T09:49:19Z"
      message: The storage resources have been created.
      reason: Done
      status: "True"
      type: StorageEnsured
    - category: Required
      lastTransitionTime: "2021-01-12T09:49:19Z"
      message: The migration plan is ready.
      status: "True"
      type: Ready
    destStorageClasses:
    - accessModes:
      - ReadWriteOnce
      default: true
      name: gp2
      provisioner: kubernetes.io/aws-ebs
    excludedResources:
    - imagetags
    - templateinstances
    - clusterserviceversions
    - packagemanifests
    - subscriptions
    - servicebrokers
    - servicebindings
    - serviceclasses
    - serviceinstances
    - serviceplans
    - operatorgroups
    - events
    namespaces:
    - name: bz-test
      workloads:
      - name: Pods
        resources:
        - pod-test
    observedDigest: 58303621a9f3161ab9c1d095a605fcb4ef619d1da5a1633b1bedfec166f8fc06
    srcStorageClasses:
    - accessModes:
      - ReadWriteOnce
      default: true
      name: gp2
      provisioner: kubernetes.io/aws-ebs