Fix copy_from warning message

- warn() does not take keyword 'msg'
- add testing around the copy_from parameter for project creation

awx_collection/test/awx/test_project.py

@@ -24,3 +24,26 @@ def test_create_project(run_module, admin_user, organization, silence_warning):
 
     result.pop('invocation')
     assert result == {'name': 'foo', 'id': proj.id}
+
+@pytest.mark.django_db
+def test_create_project_copy_from(run_module, admin_user, organization, silence_warning):
+    ''' Test the copy_from functionality'''
+    result = run_module(
+        'project',
+        dict(name='foo', organization=organization.name, scm_type='git', scm_url='https://foo.invalid', wait=False, scm_update_cache_timeout=5),
+        admin_user,
+    )
+    assert result.pop('changed', None), result
+    proj_name = 'bar'
+    result = run_module(
+        'project',
+        dict(name=proj_name, copy_from='foo', scm_type='git', wait=False),
+        admin_user,
+    )
+    assert result.pop('changed', None), result
+    result = run_module(
+        'project',
+        dict(name=proj_name, copy_from='foo', scm_type='git', wait=False),
+        admin_user,
+    )
+    silence_warning.assert_called_with(f"A project with the name {proj_name} already exists.")