Skip pylibssh tests if pylibsshext is not installed (#117)

Skip pylibssh unit tests if pylibsshext is not installed

Reviewed-by: https://github.com/apps/ansible-zuul

Author: Qalthos

tests/unit/plugins/connection/test_libssh.py

@@ -6,16 +6,19 @@
 
 __metaclass__ = type
 
+import pytest
+
+from ansible.module_utils._text import to_bytes
+from ansible.errors import AnsibleError, AnsibleFileNotFound
+from ansible.playbook.play_context import PlayContext
+from ansible.plugins.loader import connection_loader
 from ansible_collections.ansible.netcommon.tests.unit.compat import unittest
 from ansible_collections.ansible.netcommon.tests.unit.compat.mock import (
     patch,
     MagicMock,
 )
 
-from ansible.module_utils._text import to_bytes
-from ansible.errors import AnsibleError, AnsibleFileNotFound
-from ansible.playbook.play_context import PlayContext
-from ansible.plugins.loader import connection_loader
+pylibsshext = pytest.importorskip("pylibsshext")
 
 
 class TestConnectionClass(unittest.TestCase):