CASSANDRA-13775 followup - use 4 containers still

Patch by marcuse; reviewed by Eduard Tudenhoefner for CASSANDRA-13775

build.xml

@@ -1164,9 +1164,11 @@
     classpath which only contains what we expect users to need.
   -->
   <target name="test-clientutil-jar" depends="build-test,jar" description="Test clientutil jar">
+    <mkdir dir="${build.test.dir}/output"/>
     <junit fork="on" forkmode="perTest" failureproperty="testfailed" maxmemory="1024m" timeout="${test.timeout}">
-      <test name="org.apache.cassandra.serializers.ClientUtilsTest" />
+      <test name="org.apache.cassandra.serializers.ClientUtilsTest" todir="${build.test.dir}/output"/>
       <formatter type="brief" usefile="false" />
+      <formatter type="xml" usefile="true"/>
       <classpath>
         <pathelement location="${test.classes}" />
         <pathelement location="${build.dir}/${ant.project.name}-clientutil-${version}.jar" />

circle.yml

@@ -7,7 +7,7 @@ test:
     - sudo apt-get update; sudo apt-get install wamerican:
         parallel: true
   override:
-    - case $CIRCLE_NODE_INDEX in 0) ant eclipse-warnings; ant test ;; 1) ant long-test ;; 2) ant test-compression ;;esac:
+    - case $CIRCLE_NODE_INDEX in 0) ant test ;; 1) ant long-test ;; 2) ant test-compression ;; 3) ant test-clientutil-jar ;;esac:
         parallel: true
 
   post: