fix ci failure

Author: bajajneha27

google/cloud/storage/internal/async/connection_tracing.cc

@@ -328,8 +328,8 @@ class AsyncConnectionTracing : public storage::AsyncConnection {
         });
   }
 
-  void EnrichSpan(opentelemetry::trace::Span& span,
-                  BucketCacheEntry const& entry) {
+  static void EnrichSpan(opentelemetry::trace::Span& span,
+                         BucketCacheEntry const& entry) {
     span.SetAttribute("gcp.resource.destination.id", entry.id);
     span.SetAttribute("gcp.resource.destination.location", entry.location);
   }

google/cloud/storage/tests/object_plenty_clients_simultaneously_integration_test.cc

@@ -45,6 +45,7 @@ TEST_F(ObjectPlentyClientsSimultaneouslyIntegrationTest,
   // own tests.
   if (UsingGrpc()) GTEST_SKIP();
 
+  auto client = MakeIntegrationTestClient();
   auto object_name = MakeRandomObjectName();
 
   std::string expected = LoremIpsum();