change ANSIBLE_HOME instead of collections path only, set remote tmp for test

The tox command should now pass, allowing the Jenkins deploy pipeline to advance. Hopefully this would at least let us run into the next error..

test/conftest.py

@@ -54,15 +54,13 @@ def ansible_playbook_bin():
         subprocess.check_call([pip_path, 'install', 'ansible',
                                'ansible_runner'])
 
+        # Set environment variable for a custom Ansible home
+        os.environ['ANSIBLE_HOME'] = venv_dir
+
         # Add Ansible Galaxy collection
         galaxy_path = os.path.join(venv_dir, 'bin', 'ansible-galaxy')
         subprocess.check_call([galaxy_path, 'collection', 'install',
-                               TEST_CONFIG['collection-name'], '-p',
-                               os.path.join(venv_dir, 'collections')])
-
-        # Set the environment variable for the custom collections path
-        os.environ['ANSIBLE_COLLECTIONS_PATH'] = \
-            os.path.join(venv_dir, 'collections')
+                               TEST_CONFIG['collection-name']])
 
         yield os.path.join(venv_dir, 'bin', 'ansible-playbook')