HBASE-29223 Prevent instantiating MasterStatusConstants and MasterStatusUtil

as they are only static helper classes.

Author: PDavid

hbase-server/src/main/java/org/apache/hadoop/hbase/util/MasterStatusConstants.java

@@ -34,4 +34,7 @@ public class MasterStatusConstants {
   public static final String FORMAT = "format";
   public static final String PARENT = "parent";
 
+  private MasterStatusConstants() {
+    // Do not instantiate.
+  }
 }

hbase-server/src/main/java/org/apache/hadoop/hbase/util/MasterStatusUtil.java

@@ -35,6 +35,10 @@
 @InterfaceAudience.Private
 public class MasterStatusUtil {
 
+  private MasterStatusUtil() {
+    // Do not instantiate.
+  }
+
   public static String getUserTables(HMaster master, List<TableDescriptor> tables) {
     if (master.isInitialized()) {
       try {