Added Hierholzer Algorith to find Eulerian Path

Author: crashmovies

src/main/java/com/thealgorithms/graph/HierholzerEulerianPath.java

@@ -1,10 +1,10 @@
 package com.thealgorithms.graph;
 
-import java.util.List;
+import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Deque;
-import java.util.ArrayDeque;
+import java.util.List;
 
 /**
  * Implementation of Hierholzer's Algorithm for finding an Eulerian Path or Circuit

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

@@ -2,9 +2,9 @@
 
 import static org.junit.jupiter.api.Assertions.*;
 
-import java.util.List;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.List;
 import org.junit.jupiter.api.Test;
 
 /**