Description of problem:
VM import from VMware to CNV via API (vmio) of a RHEL-7/8 reaches 75%, once the 
image import is completed (that takes ~5 minutes for a 25GB disk)  

Version-Release number of selected component (if applicable):
CNV-2.5 - iib:19290

How reproducible:
100%
Tried 3 different VMs, with NFS & Ceph-RBD/Block.

Steps to Reproduce:
1. Add vddk-init-image

# oc -n openshift-cnv edit cm v2v-vmware
Listing:
apiVersion: v1
data:
  kubevirt-vmware-image: brew-pulp-docker01.web.prod.ext.phx2.redhat.com:8888/container-native-virtualization/kubevirt-vmware:v2.1.0-6
  kubevirt-vmware-image-pull-policy: IfNotPresent
  v2v-conversion-image: registry-proxy.engineering.redhat.com/rh-osbs/container-native-virtualization-kubevirt-v2v-conversion:v2.1.0-10
  vddk-init-image: <server FQDN>:5000/vddk-images/vddk:v700  <==== vddk image
kind: ConfigMap
metadata:
  creationTimestamp: 2019-10-24T11:40:26Z
  name: v2v-vmware
  namespace: openshift-cnv
  resourceVersion: "3652730"
  selfLink: /api/v1/namespaces/openshift-cnv/configmaps/v2v-vmware
  uid: 1272cd5a-f653-11e9-bd31-5254000a752d

2. Add Secret:

cat <<EOF | oc create -f -
---
apiVersion: v1
kind: Secret
metadata:
 name: vmw-secret
type: Opaque
stringData:
 vmware: |-
   # API URL of the vCenter or ESXi host
   apiUrl: "https://<VMware IP address>/sdk"
   # Username provided in the format of username@domain.
   username: <username>
   password: <password>
   # The certificate thumbprint of the vCenter or ESXi host, in colon-separated hexidecimal octets.
   thumbprint: 31:...:30
EOF

3. External mapping

cat <<EOF | oc create -f -
apiVersion: v2v.kubevirt.io/v1beta1
kind: ResourceMapping
metadata:
 name: example-vmware-resourcemappings
 namespace: default
spec:
  vmware:
    networkMappings:
    - source:
        name: VM Network # map network name to network attachment definition
      target: 
        name: pod
      type: pod
    storageMappings:
    - source:
        id: datastore-12 
      target: 
        name: nfs  <== Or use Ceph-RBD/Block
EOF

4. VM import create

cat <<EOF | oc create -f -
apiVersion: v2v.kubevirt.io/v1beta1
kind: VirtualMachineImport
metadata:
  name: vmware-import-1
  namespace: default
spec:
  providerCredentialsSecret:
    name: vmw-secret
    namespace: default # optional, if not specified, use CR's namespace
  resourceMapping:
    name: example-vmware-resourcemappings
    namespace: default
  targetVmName: vmw-import-1
  startVm: false
  source:
    vmware:
      vm:
        id: 4203b421-575c-ed5e-cbad-9d390f2eb101   
EOF

Expected results:
VM import should not take so long to complete the post image import tasks - last 25% of the overall VM import process.