Shared CVS Repositories don't show up in deployment environments

Summary

CVS repositories linked repositories are not available for selection in a "Source Code Checkout" task for deployment environments.

Steps to Reproduce

1. Add a CVS linked repository at Bamboo Administration > Linked Repositories
2. Add a Source Code Checkout task to a Deployment Environment.

Expected Results

CVS repository is available for selection.

Actual Results

CVS repository is not available in the dropdown.

Workaround

None