Implement small requested changes

Author: dgetu

opentelemetry-sdk/src/opentelemetry/sdk/resources/__init__.py

@@ -217,7 +217,7 @@ def merge(self, other: "Resource") -> "Resource":
         elif self.schema_url == other.schema_url:
             schema_url = other.schema_url
         else:
-            schema_url = "merge-conflict"
+            schema_url = ""
             logger.error(
                 "Failed to merge resources: The Schema URL of the old and updating resources are not empty and are different"
             )

opentelemetry-sdk/tests/resources/test_resources.py

@@ -52,6 +52,7 @@ def test_create(self):
         resource = resources.Resource.create(attributes)
         self.assertIsInstance(resource, resources.Resource)
         self.assertEqual(resource.attributes, expected_attributes)
+        self.assertEqual(resource.schema_url, "")
 
         schema_url = "https://opentelemetry.io/schemas/1.3.0"
 
@@ -146,7 +147,7 @@ def test_resource_merge(self):
         left = resources.Resource.create({}, schema_urls[0])
         right = resources.Resource.create({}, schema_urls[1])
         with self.assertLogs(level=ERROR):
-            left.merge(right)
+            self.assertEqual(left.merge(right).schema_url, "")
 
     def test_resource_merge_empty_string(self):
         """Verify Resource.merge behavior with the empty string.