retry test

Author: Sita04

iam/api-client/src/test/java/iam/snippets/ServiceAccountTests.java

@@ -19,13 +19,15 @@
 import static org.hamcrest.core.StringContains.containsString;
 import static org.junit.Assert.assertNotNull;
 
+import com.google.cloud.testing.junit4.MultipleAttemptsRule;
 import java.io.ByteArrayOutputStream;
 import java.io.PrintStream;
 import java.util.UUID;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.FixMethodOrder;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -42,6 +44,8 @@ public class ServiceAccountTests {
   private ByteArrayOutputStream bout;
   private final PrintStream originalOut = System.out;
 
+  @Rule MultipleAttemptsRule multipleAttemptsRule = new MultipleAttemptsRule(3);
+
   private static void requireEnvVar(String varName) {
     assertNotNull(
         System.getenv(varName),