HDDS-1840. Fix TestSecureOzoneContainer. (#1135)

hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/container/ozoneimpl/TestSecureOzoneContainer.java

@@ -26,6 +26,7 @@ import org.apache.hadoop.hdds.protocol.proto.HddsProtos.BlockTokenSecretProto.Ac
 import org.apache.hadoop.hdds.security.exception.SCMSecurityException;
 import org.apache.hadoop.hdds.security.token.OzoneBlockTokenIdentifier;
 import org.apache.hadoop.hdds.security.x509.SecurityConfig;
+import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
 import org.apache.hadoop.ozone.OzoneConfigKeys;
 import org.apache.hadoop.hdds.conf.OzoneConfiguration;
 import org.apache.hadoop.ozone.client.CertificateClientTestImpl;
@@ -110,6 +111,7 @@ public class TestSecureOzoneContainer {
 
   @Before
   public void setup() throws Exception {
+    DefaultMetricsSystem.setMiniClusterMode(true);
     conf = new OzoneConfiguration();
     String ozoneMetaPath =
         GenericTestUtils.getTempPath("ozoneMeta");