test: disable metrics for emulator based ITs (googleapis#2637)

Change-Id: I56119f9cce8abe8317fc9580a13f4588035de80d

Author: igorbernstein2

google-cloud-bigtable/src/test/java/com/google/cloud/bigtable/test_helpers/env/EmulatorEnv.java

@@ -22,6 +22,7 @@
 import com.google.cloud.bigtable.admin.v2.models.CreateTableRequest;
 import com.google.cloud.bigtable.data.v2.BigtableDataClient;
 import com.google.cloud.bigtable.data.v2.BigtableDataSettings;
+import com.google.cloud.bigtable.data.v2.stub.metrics.NoopMetricsProvider;
 import com.google.cloud.bigtable.emulator.v2.Emulator;
 import com.google.common.base.Strings;
 import java.io.IOException;
@@ -62,6 +63,7 @@ void start() throws Exception {
             .setProjectId("fake-project")
             .setInstanceId("fake-instance")
             .setRefreshingChannel(false)
+            .setMetricsProvider(NoopMetricsProvider.INSTANCE)
             .build();
 
     dataClient = BigtableDataClient.create(dataSettings);