test_sole_test: fix fnmatch_lines for pytest-2.6.0-dev

With pytest 2.6 the output format for `-v` changes:

    from: tpkg/test_the_test.py:8: TestFoo.test_foo PASSED
    to:   tpkg/test_the_test.py@8::TestFoo::test_foo PASSED
Merge pull request #104 from blueyed/fix-test_sole_test-for-pytest26

test_sole_test: fix fnmatch_lines for pytest-2.6.0-dev