YARN-4658. Typo in o.a.h.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler comment (Contributed by Udai Potluri via Daniel Templeton)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestContinuousScheduling.java

@@ -261,7 +261,7 @@ public class TestContinuousScheduling extends FairSchedulerTestBase {
     FairScheduler spyScheduler = spy(scheduler);
     Assert.assertTrue("Continuous scheduling should be disabled.",
         !spyScheduler.isContinuousSchedulingEnabled());
-    // Add one nodes
+    // Add one node
     RMNode node1 =
         MockNodes.newNodeInfo(1, Resources.createResource(8 * 1024, 8), 1,
             "127.0.0.1");