Add class to converting Roman Nubers to Arabic Numbers, and init test
Add functionality of converting II to 2 and III to 3
Code refactor - add RomanToArab test data provider
Add functionality of converting V to 5
Add functionality of converting X to 10
Code refactor - change a method of converting roman to Arab number
Add functionality of converting C to 100, D to 500, M to 1000
Add functionality of converting IV to 4, IX to 9 XL to 40 etc, and test for random number
code refactor - add array with convertings strings
test code refactor - one data provider for both tests