feat(path): implement getMinimumTravelTime

be-graphes-model/src/main/java/org/insa/graphs/model/Path.java

@@ -239,12 +239,13 @@ public class Path {
      * on every arc.
      * 
      * @return Minimum travel time to travel this path (in seconds).
-     * 
-     * @deprecated Need to be implemented.
      */
     public double getMinimumTravelTime() {
-        // TODO:
-        return 0;
+        double somme = 0 ;
+        for (Arc arc : arcs) {
+            somme += arc.getMinimumTravelTime();
+        }
+        return somme;
     }
 
 }