Item tree key

Item tree key

ItemTreeKey is a key for TestItemTree(wiki) and TestItemLeaf(wiki) items mapping. It contains name and hash fields:

    private final String name;
    private final int hash;

ItemTreeKey instance can be created using one of methods:

    1. public static ItemTreeKey of(String name) {
			return new ItemTreeKey(name);
		}
    2. public static ItemTreeKey of(String name, int hash) {
			return new ItemTreeKey(name, hash);
		}

Method #2 allows to provide hash(generated by agent) to prevent clashing ItemTreeKeys created for different TestItems with the same names.