Added Hierholzer Algorith to find Eulerian Path

Author: crashmovies

src/test/java/com/thealgorithms/graph/HierholzerEulerianPathTest.java

@@ -1,6 +1,7 @@
 package com.thealgorithms.graph;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.util.Arrays;
 import java.util.Collections;