The BoardListOption field BoardType was incorrectly mapped to boardType
instead of type. This commit fixes it. A generic test helper
function (testRequestParams) is added in order to improve the
effectiveness of the unit test.
Fixes#213
* creates a GetAllSprintsOptions structure
* adds a new GetAllSprintsWithOptions method to accept an int boardID and new options structure
* adds filtering functionality to GetAllSprintsWithOptions method
* adds SprintsList type for handling pagination results data from GetAllSprints request
* updates tests
