Inter-med-ARF should not get into 'Validate Product' flow, because ARF
files don't expose no media info data.
The change of the inter-med-ARF caused provisioning of wrong source
object to the ValidateProduct function.
This fix adds workaround to that case.

Further investigation is required.
Merge pull request #68 from kaltura/IX-9.0.0-arf-inter-src-fix

Inter-med-ARF should not get into 'Validate Product' flow, because ARF