Make Lazy.orElseGet(Supplier) public.

Closes #2929
Original pull request: #2930

Author: gregturn

src/main/java/org/springframework/data/util/Lazy.java

@@ -32,6 +32,7 @@
  * @author Mark Paluch
  * @author Henning Rohlfs
  * @author Johannes Englmeier
+ * @author Greg Turnquist
  * @since 2.0
  */
 public class Lazy<T> implements Supplier<T> {
@@ -179,7 +180,7 @@ public T orElse(@Nullable T value) {
 	 * @return
 	 */
 	@Nullable
-	private T orElseGet(Supplier<? extends T> supplier) {
+	public T orElseGet(Supplier<? extends T> supplier) {
 
 		Assert.notNull(supplier, "Default value supplier must not be null");