Fix GraphSplitterSolver

Changes courtesy of @schnauby

Custom-Graph-Library/src/main/java/de/uni/bremen/cluster/editing/custom/graph/library/model/implementation/custom/BasicProblemInstance.java

@@ -30,6 +30,11 @@ public class BasicProblemInstance extends BasicUndirectedGraph implements Proble
     t = new HashMap<>();
   }
 
+  public BasicProblemInstance(final Map<UndirectedEdge, Status> t) {
+    super();
+    this.t = new HashMap<>(t);
+  }
+
   public BasicProblemInstance(final BasicProblemInstance parent) {
     super(parent);
     this.k = parent.k;