[Test] Fix reported number of passed tests
[Test] Fix reported number of passed tests

The file used to identify the results of the individual Python 3 tests was being
truncated. Updating it incrementally seems to avoid the problem.

Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera,Heathckliff/cantera,Heathckliff/cantera,Heathckliff/cantera,Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera