HDDS-5792. Speed up TestNSSummaryAdmin by having zero Datanodes (#2688)

diff --git a/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/shell/TestNSSummaryAdmin.java b/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/shell/TestNSSummaryAdmin.java
index f563bee..1cfd3f7 100644
--- a/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/shell/TestNSSummaryAdmin.java
+++ b/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/shell/TestNSSummaryAdmin.java
@@ -42,7 +42,8 @@
     conf.setBoolean("ozone.om.enable.filesystem.paths", true);
     conf.set("ozone.om.metadata.layout", "PREFIX");
     conf.set(OZONE_RECON_ADDRESS_KEY, "localhost:9888");
-    cluster = MiniOzoneCluster.newBuilder(conf).includeRecon(true).build();
+    cluster = MiniOzoneCluster.newBuilder(conf)
+        .withoutDatanodes().includeRecon(true).build();
     cluster.waitForClusterToBeReady();
     // Client uses server conf for this test
     ozoneAdmin = new OzoneAdmin(conf);