Fix unit tests which modify the source tree. (#45763)

* Fix CNOS unit test log usage.
* Use temp dir for Galaxy unit tests.
* Write to temp files in interfaces_file unit test.
* Fix log placement in netapp_e_ldap unit test.

test/units/modules/network/cnos/cnos_module.py

@@ -21,6 +21,7 @@ __metaclass__ = type
 
 import os
 import json
+import tempfile
 
 from ansible.compat.tests import unittest
 from ansible.compat.tests.mock import patch
@@ -59,6 +60,15 @@ class AnsibleFailJson(Exception):
 
 
 class TestCnosModule(unittest.TestCase):
+    def setUp(self):
+        super(TestCnosModule, self).setUp()
+
+        self.test_log = tempfile.mkstemp(prefix='ansible-test-cnos-module-', suffix='.log')[1]
+
+    def tearDown(self):
+        super(TestCnosModule, self).tearDown()
+
+        os.remove(self.test_log)
 
     def execute_module(self, failed=False, changed=False, commands=None,
                        sort=True, defaults=False):