Fixing incorrect method names

Both in Product Warehouse Project.
-Translated method name that was still in Finnish (and would not compile of course).
-Fixed incorrect method in testing code (Product Warehouse with History Part 2). Testing with corrected code should properly produce the result previously specified below the code.

data/part-9/1-inheritance.md

@@ -1509,7 +1509,7 @@ System.out.println(mehu);           // saldo = 988.7, tilaa 11.3
 ```java
 ProductWarehouse juice = new ProductWarehouse("Juice", 1000.0);
 juice.addToWarehouse(1000.0);
-juice.otaVarastosta(11.3);
+juice.takeFromWarehouse(11.3);
 System.out.println(juice.getName()); // Juice
 System.out.println(juice);           // balance = 988.7, space left 11.3
 ```
@@ -1754,7 +1754,7 @@ System.out.println(mehu.historia()); // [1000.0, 988.7, 989.7]
 ProductWarehouseWithHistory juice = new ProductWarehouseWithHistory("Juice", 1000.0, 1000.0);
 juice.takeFromWarehouse(11.3);
 System.out.println(juice.getName()); // Juice
-juice.takeFromWarehouse(1.0);
+juice.addToWarehouse(1.0);
 System.out.println(juice);           // Juice: balance = 989.7, space left 10.3
 
 // etc