Description of problem:

When performing a cold migration with a VMware vCenter provider and "Skip CA" enabled, the migration fails during the ImageConversion phase.

The failure is due to a missing vddk-thumbprint parameter in the virt-v2v command. The command is constructed with an empty thumbprint value, as shown below:

-io vddk-thumbprint=

This causes VixDiskLib_ConnectEx to fail with the following error: vbnetCopyEdit

VixDiskLib: A thumbprint is required for SSL certificate validation.
VixDiskLib_ConnectEx: One of the parameters was invalid

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

2.9.0 - on-pr-e59063af24430a99c201385520392cc1c1421019

How reproducible:

Always / N%

Steps to Reproduce:

1. Create a VMware vCenter provider in the UI.
* Enable the "Skip CA" option during provider creation.
2. Create a cold migration plan using this provider.
* Select any VM to migrate.
* Ensure the migration type is set to cold.   
3. Execute the migration. 

Actual results:

Fail on "ImageConversion" phase

Expected results:

Success

Additional info: