Make Utils Class constructor private to enforce noninstantiability (#3266)

- Changed constructor to private to prevent instantiation

Author: ori0o0p

src/main/java/io/lettuce/core/internal/LettuceClassUtils.java

@@ -11,6 +11,10 @@
  */
 public class LettuceClassUtils {
 
+    private LettuceClassUtils() {
+        // No Instances.
+    }
+
     /** The CGLIB class separator character "$$" */
     public static final String CGLIB_CLASS_SEPARATOR = "$$";
 

src/main/java/io/lettuce/core/masterreplica/ReplicaUtils.java

@@ -11,6 +11,10 @@
  */
 class ReplicaUtils {
 
+    private ReplicaUtils() {
+        // No Instances.
+    }
+
     /**
      * Check if properties changed.
      *

src/test/java/io/lettuce/test/ReflectionTestUtils.java

@@ -11,6 +11,10 @@
  */
 public final class ReflectionTestUtils {
 
+    private ReflectionTestUtils() {
+        // No Instances.
+    }
+
     /**
      * Get the value of the {@linkplain Field field} with the given {@code name} from the provided {@code targetObject}.
      * <p>