AMBARI-17769. property_description is null for some properties in config page. Fix unit test (dlysnichenko)

ambari-server/src/main/resources/stacks/HDP/2.3.GlusterFS/services/YARN/configuration/capacity-scheduler.xml

@@ -25,7 +25,6 @@
       resources such as Memory, CPU etc. A Java ResourceCalculator class name is expected.
     </description>
     <value>org.apache.hadoop.yarn.util.resource.DefaultResourceCalculator</value>
-    <description/>
     <on-ambari-upgrade add="true"/>
   </property>
   <property>