Renamed `do_unit_test macro` as `do_test`.
Reused `do_test` instead of `do_unit_test` in `CMakeLists.txt` files.
Merge remote-tracking branch 'origin' into maint-rename-cmake-macro-for-testing

Conflicts:
	test/Graphics/CMakeLists.txt
Merge pull request #46 from DO-CV/maint-rename-cmake-macro-for-testing

[MAINT] Rename CMake macro for testing.