Remove full path from unittest title on test UI

[eleanorjboyd]

Currently for unittest the full dot path displays for the test explorer UI, for example test_subtests.NumbersTest.test_even(i=0). This is unneeded information as it already sits nested in test_subtests.py / NumbersTest / test_even in the UI tree. Switch so the name for the subtests is only the part in parenthesis.

[eleanorjboyd]

verification steps:
use unittest subtests, check that the name of the test in the test explorer after running is just a number for subtests of the following test case. So the subtests would be case [0], [1] ....

import unittest


class NumbersTest(unittest.TestCase):
    def test_even(self):
        """
        Test that numbers between 0 and 5 are all even.
        """
        for i in range(0, 5):
            with self.subTest(i=i):
                self.assertEqual(i % 2, 0)

[alexr00]

I think this is right