HBASE-23971 protoc warns: "no protobuf syntax specified" (apache#1278)

Remove overcommit in TestUsersOperationsWithSecureHadoop
(Noticed by ndimiduk)

hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestUsersOperationsWithSecureHadoop.java

@@ -29,7 +29,6 @@
 
 import java.io.File;
 import java.io.IOException;
-import java.util.concurrent.TimeUnit;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.AuthUtil;
@@ -65,11 +64,7 @@ public class TestUsersOperationsWithSecureHadoop {
   private static String CLIENT_NAME;
 
   @BeforeClass
-  public static void destroyAndSetup() throws Exception {
-    //destroy localhost kerberos users
-    Process process = Runtime.getRuntime().exec(new String[]{"bash", "-c", "kdestroy"});
-    process.waitFor(2, TimeUnit.SECONDS);
-    // setup mini kdc
+  public static void setUp() throws Exception {
     KDC = TEST_UTIL.setupMiniKdc(KEYTAB_FILE);
     PRINCIPAL = "hbase/" + HOST;
     CLIENT_NAME = "foo";