Revert "Issue #121: removed CMake CI build step involving testing with both colour spaces due to issue #125"
Revert "Issue #121: removed CMake CI build step involving testing with both colour spaces due to issue #125"

This reverts commit 944b629fc386eb9503a623a68f3e5a92bc3df395.

gift-surg/GIFT-Grab,gift-surg/GIFT-Grab,gift-surg/GIFT-Grab,gift-surg/GIFT-Grab