Slope One Algorithm (#917)

* @Async and Spring Security

* @Async with SecurityContext propagated

* Spring and @Async

* Simulated Annealing algorithm

* Simulated Annealing algorithm

* Rebase

* Rebase

* SA further fixes

* Slope One plus package refactoring

core-java/src/test/java/com/baeldung/algorithms/SimulatedAnnealingTest.java

@@ -3,6 +3,8 @@ package com.baeldung.algorithms;
 import org.junit.Assert;
 import org.junit.Test;
 
+import com.baeldung.algorithms.annealing.SimulatedAnnealing;
+
 public class SimulatedAnnealingTest {
 
     @Test