YARN-7309. TestClientRMService#testUpdateApplicationPriorityRequest and TestClientRMService#testUpdatePriorityAndKillAppWithZeroClusterResource test functionality not supported by FairScheduler (rkanter)

(cherry picked from commit ec8bf9e48ac4dc675516a57c06a29890b5138548)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestClientRMService.java

@@ -142,6 +142,7 @@ import org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerAppRepor
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.YarnScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacitySchedulerConfiguration;
+import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.security.QueueACLsManager;
 
 import org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey;
@@ -152,6 +153,7 @@ import org.apache.hadoop.yarn.util.UTCClock;
 import org.apache.hadoop.yarn.util.resource.ResourceCalculator;
 import org.apache.hadoop.yarn.util.resource.Resources;
 import org.junit.Assert;
+import org.junit.Assume;
 import org.junit.Test;
 
 import com.google.common.collect.ImmutableSet;
@@ -1675,6 +1677,9 @@ public class TestClientRMService {
     int maxPriority = 10;
     int appPriority = 5;
     YarnConfiguration conf = new YarnConfiguration();
+    Assume.assumeFalse("FairScheduler does not support Application Priorities",
+        conf.get(YarnConfiguration.RM_SCHEDULER)
+            .equals(FairScheduler.class.getName()));
     conf.setInt(YarnConfiguration.MAX_CLUSTER_LEVEL_APPLICATION_PRIORITY,
         maxPriority);
     MockRM rm = new MockRM(conf);
@@ -1693,6 +1698,9 @@ public class TestClientRMService {
     int maxPriority = 10;
     int appPriority = 5;
     YarnConfiguration conf = new YarnConfiguration();
+    Assume.assumeFalse("FairScheduler does not support Application Priorities",
+        conf.get(YarnConfiguration.RM_SCHEDULER)
+            .equals(FairScheduler.class.getName()));
     conf.setInt(YarnConfiguration.MAX_CLUSTER_LEVEL_APPLICATION_PRIORITY,
         maxPriority);
     MockRM rm = new MockRM(conf);