Description of problem:
On migrating an application including BuildConfig from source to target cluster, builder pod results in error, failing to push the image to the image registry.

Version-Release number of selected component (if applicable):
1.8.0

How reproducible:
Always

Steps to Reproduce:
1. Deploy a stateful app with buildconfig resource
2. Create a migplan to migrate the application to target cluster
3. Execute the cutover migration
4. Once it finishes, check the migrated namespace pods in the target cluster.

Actual results:
Builder pod results in error.

Expected results:
Builder pod should be in completed state.

Additional info:

Pushing image image-registry.openshift-image-registry.svc:5000/app3/django-psql-persistent:latest ...
Getting image source signatures
Copying blob sha256:46b052e159fc16cdd50d3fc157ee3d37b0fdca26fac02c125590d9d3667499f6
Copying blob sha256:1323a241cc068f2816dd88f00168be73339471d6dc6eb2e6c761b63b734501b6
Copying blob sha256:fa92b53b7e2a0f05f79049d0c54dcca9b7e32f2bb01ad346d22145da90e26270
Copying blob sha256:5d011ac93e7456d4c646b0fbb53712598bda9a6b0d027b2be788016e078ded77
Copying blob sha256:06e86f96ac440a1dc8228bc46944781eae85e4d1bdaf8b66ed0c3ca60c25e36f
Copying blob sha256:2bd25ca124579d6fce8668ff5d4ed83866d7e7438cb561a51ddde8cc40272822
Warning: Push failed, retrying in 5s ...
Getting image source signatures
Copying blob sha256:46b052e159fc16cdd50d3fc157ee3d37b0fdca26fac02c125590d9d3667499f6
Copying blob sha256:1323a241cc068f2816dd88f00168be73339471d6dc6eb2e6c761b63b734501b6
Copying blob sha256:fa92b53b7e2a0f05f79049d0c54dcca9b7e32f2bb01ad346d22145da90e26270
Copying blob sha256:5d011ac93e7456d4c646b0fbb53712598bda9a6b0d027b2be788016e078ded77
Copying blob sha256:06e86f96ac440a1dc8228bc46944781eae85e4d1bdaf8b66ed0c3ca60c25e36f
Copying blob sha256:2bd25ca124579d6fce8668ff5d4ed83866d7e7438cb561a51ddde8cc40272822
Warning: Push failed, retrying in 5s ...
Getting image source signatures
Copying blob sha256:46b052e159fc16cdd50d3fc157ee3d37b0fdca26fac02c125590d9d3667499f6
Copying blob sha256:fa92b53b7e2a0f05f79049d0c54dcca9b7e32f2bb01ad346d22145da90e26270
Copying blob sha256:1323a241cc068f2816dd88f00168be73339471d6dc6eb2e6c761b63b734501b6
Copying blob sha256:5d011ac93e7456d4c646b0fbb53712598bda9a6b0d027b2be788016e078ded77
Copying blob sha256:06e86f96ac440a1dc8228bc46944781eae85e4d1bdaf8b66ed0c3ca60c25e36f
Copying blob sha256:2bd25ca124579d6fce8668ff5d4ed83866d7e7438cb561a51ddde8cc40272822
Warning: Push failed, retrying in 5s ...
Registry server Address:
Registry server User Name: serviceaccount
Registry server Email: serviceaccount@example.org
Registry server Password: <<non-empty>>
error: build error: Failed to push image: trying to reuse blob sha256:1323a241cc068f2816dd88f00168be73339471d6dc6eb2e6c761b63b734501b6 at destination: pinging container registry image-registry.openshift-image-registry.svc:5000: Get "https://image-registry.openshift-image-registry.svc:5000/v2/": x509: certificate signed by unknown authority

]$ oc get pods -n app3
NAME READY STATUS RESTARTS AGE
django-psql-persistent-1-5rqbs 1/1 Running 0 2m31s
django-psql-persistent-1-build 0/1 Error 0 2m34s
django-psql-persistent-1-deploy 0/1 Completed 0 2m33s
postgresql-1-deploy 0/1 Completed 0 2m34s
postgresql-1-ds9nt 1/1 Running 0 2m32s