Don't override a failing result

[gk-sysdig]

The motivation for this change is if a module, let's call it test_01.py is marked with a dependency like this:

import pytest
pytestmark = [
    pytest.mark.order(1),
    pytest.mark.dependency(name="01_setup", scope="session"),
]

def test_01():
    assert False

def test_01a():
    assert True

Then tests in a dependent test module will run instead of being skipped if test_01 fails.
For example test_02.py:

import pytest
pytestmark = [
    pytest.mark.order(2),
    pytest.mark.dependency(depends=["01_setup"], name="02_setup", scope="session"),
]

def test_02():
    assert True

This PR makes it such that test_02 is skipped if any test fails in test_01.py