changed many arrayLists to Hashmaps

...va/de/hhu/ba/yoshikoWrapper/graphModel/YoshikoResult.java

.../de/hhu/ba/yoshikoWrapper/graphModel/YoshikoSolution.java

...e/hhu/ba/yoshikoWrapper/swing/components/SolutionTab.java

...in/java/de/hhu/ba/yoshikoWrapper/tasks/AlgorithmTask.java

...a/de/hhu/ba/yoshikoWrapper/tasks/CreateMetaGraphTask.java

.../java/de/hhu/ba/yoshikoWrapper/tasks/GetClustersTask.java

...java/de/hhu/ba/yoshikoWrapper/tasks/GetSolutionsTask.java