fix a bug in the CredentialType field validator that breaks required

see: #6769

awx/main/fields.py

@@ -542,6 +542,10 @@ class CredentialTypeInputField(JSONSchemaField):
             'type': 'object',
             'additionalProperties': False,
             'properties': {
+                'required': {
+                    'type': 'array',
+                    'items': {'type': 'string'}
+                },
                 'fields':  {
                     'type': 'array',
                     'items': {

awx/main/tests/functional/api/test_credential_type.py

@@ -170,6 +170,30 @@ def test_create_with_valid_inputs(get, post, admin):
     assert fields[0]['type'] == 'string'
 
 
+@pytest.mark.django_db
+def test_create_with_required_inputs(get, post, admin):
+    response = post(reverse('api:credential_type_list'), {
+        'kind': 'cloud',
+        'name': 'MyCloud',
+        'inputs': {
+            'fields': [{
+                'id': 'api_token',
+                'label': 'API Token',
+                'type': 'string',
+                'secret': True
+            }],
+            'required': ['api_token'],
+        },
+        'injectors': {}
+    }, admin)
+    assert response.status_code == 201
+
+    response = get(reverse('api:credential_type_list'), admin)
+    assert response.data['count'] == 1
+    required = response.data['results'][0]['inputs']['required']
+    assert required == ['api_token']
+
+
 @pytest.mark.django_db
 @pytest.mark.parametrize('inputs', [
     True,