#1 Added failing test for getting BUZZ for 5
 #1 Added functional for getting BUZZ
   * Fixed failing test
 #1 Small refactoring. Replace str BUZZ to const
 #1 Change string values of consts FIZZ and BUZZ
 #1 Added failing test for FizzBuzz
 #1 Fixed failing test for FizzBuzz
    * Added functionality for procesing FizzBuzz number