Update duthost_utils.py (sonic-net#13302)

Fix import AnsibleConnectionFailure from ansible.errors issue.

Why I did it
In ansible the AnsibleConnectionFailure defined in 2 place:
pytest_ansible.errors
ansible.errors

In this PR: sonic-net#13277
The code should import the pytest_ansible.errors.AnsibleConnectionFailure

How I did it
Import AnsibleConnectionFailure from pytest_ansible.errors

How to verify it
Pass all test case.

co-authorized by: [email protected]

tests/common/fixtures/duthost_utils.py

@@ -9,7 +9,7 @@
 import time
 import json
 
-from ansible.errors import AnsibleConnectionFailure
+from pytest_ansible.errors import AnsibleConnectionFailure
 from paramiko.ssh_exception import AuthenticationException
 
 from tests.common import config_reload