fix test

Author: rahul2393

java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/OpenTelemetryBuiltInMetricsTracerTest.java

@@ -74,6 +74,7 @@ public class OpenTelemetryBuiltInMetricsTracerTest extends AbstractNettyMockServ
       BuiltInMetricsProvider.INSTANCE.createClientAttributes();
   private static final Attributes expectedCommonBaseAttributes =
       Attributes.builder()
+          .put(BuiltInMetricsConstant.PROJECT_ID_KEY, "test-project")
           .put(BuiltInMetricsConstant.CLIENT_NAME_KEY, "spanner-java/")
           .put(BuiltInMetricsConstant.CLIENT_UID_KEY, attributes.get("client_uid"))
           .put(BuiltInMetricsConstant.INSTANCE_ID_KEY, "i")