Revert "Temporarily disable unit test building until downgrade to 3.5 is done"
Revert "Temporarily disable unit test building until downgrade to 3.5 is done"

This reverts commit 1badfbb28b05a5b719b334966596424a1dcf15ca.

github-for-unity/Unity,mpOzelot/Unity,github-for-unity/Unity,mpOzelot/Unity,github-for-unity/Unity