Check that the tests are using recent version of python3.

Ensure that we are using python3 from this decade,
so the we can use some of the more recent features.

Test: ./art/test/testrunner/run_build_test_target.py -j80 art-test
Change-Id: Ic1926a767ff438877645a79d0e6064baa9e2983b
1 file changed