cmake: run the tests by default

[pabs3]

The tests are not run by default from make test or make check. In theory adding these two lines to Test/CMakeLists.txt should do this, but I have not been able to get it to work.

enable_testing()
add_test(test test)

[pabs3]

Looks like this is required in the main cmake file order to run the tests:

include(CTest)