HDDS-1050. TestSCMRestart#testPipelineWithScmRestart is failing. Contributed by Supratim Deka.

hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/hdds/scm/pipeline/TestSCMRestart.java

@@ -58,7 +58,7 @@ public class TestSCMRestart {
   public static void init() throws Exception {
     conf = new OzoneConfiguration();
     cluster = MiniOzoneCluster.newBuilder(conf)
-        .setNumDatanodes(7)
+        .setNumDatanodes(4)
         .setHbInterval(1000)
         .setHbProcessorInterval(1000)
         .build();