Add unit test for DeployRepository#versions
Add unit test for DeployRepository#versions

Signed-off-by: Oleksandr Kurk <72fa60396af78a3db0eeeabde98c08f790aa02e0@fundingcircle.com>

FundingCircle/shipment_tracker,FundingCircle/shipment_tracker,FundingCircle/shipment_tracker,FundingCircle/shipment_tracker