disable gRPC gcp extension in tests

Author: sakthivelmanii

sdks/java/io/google-cloud-platform/src/test/java/org/apache/beam/sdk/io/gcp/spanner/SpannerReadIT.java

@@ -114,7 +114,7 @@ public void setUp() throws Exception {
       project = options.as(GcpOptions.class).getProject();
     }
 
-    spanner = SpannerOptions.newBuilder().setProjectId(project).build().getService();
+    spanner = SpannerOptions.newBuilder().setProjectId(project).disableGrpcGcpExtension().build().getService();
 
     databaseName = generateDatabaseName();
     pgDatabaseName = "pg-" + databaseName;

sdks/java/io/google-cloud-platform/src/test/java/org/apache/beam/sdk/io/gcp/spanner/SpannerWriteIT.java

@@ -121,7 +121,7 @@ public void setUp() throws Exception {
       project = options.as(GcpOptions.class).getProject();
     }
 
-    spanner = SpannerOptions.newBuilder().setProjectId(project).build().getService();
+    spanner = SpannerOptions.newBuilder().setProjectId(project).disableGrpcGcpExtension().build().getService();
 
     databaseName = generateDatabaseName();
     pgDatabaseName = "pg-" + databaseName;

sdks/java/io/google-cloud-platform/src/test/java/org/apache/beam/sdk/io/gcp/spanner/changestreams/it/IntegrationTestEnv.java

@@ -77,7 +77,12 @@ protected void before() throws Throwable {
     instanceId = options.getInstanceId();
     generateDatabaseIds(options);
     spanner =
-        SpannerOptions.newBuilder().setProjectId(projectId).setHost(host).build().getService();
+        SpannerOptions.newBuilder()
+          .setProjectId(projectId)
+          .setHost(host)
+          .disableGrpcGcpExtension()
+          .build()
+          .getService();
     databaseAdminClient = spanner.getDatabaseAdminClient();
     metadataTableName = generateTableName(METADATA_TABLE_NAME_PREFIX);