Update build.xml

Core/build.xml

@@ -203,8 +203,12 @@
         <copy file="${thirdparty.dir}/LICENSE-2.0.txt" todir="${ext.dir}" />        
         <!-- fetch all the dependencies from Ivy and stick them in the right places -->
         <ivy:resolve log="quiet"/>
+	    
+        <!-- Make a report that lists out the dependencies that our JARs have -->	
         <ivy:report todir='${basedir}/build/ivy-reports' graph='true' xml='false'/>
         <ivy:retrieve conf="core" pattern="${ext.dir}/[artifact]-[revision](-[classifier]).[ext]" />
+	    
+	<!-- ZooKeeper is currently (Jan 2022) pulling down Log4J 1. Delete it so that we use only v2 -->
         <delete file="${basedir}/release/modules/ext/log4j-1.2.16.jar"/>
     </target>