URBNG-148 - [WP] Send choices for verification

Done:
- URBNG-399 - [WP] Create mock-up responses to submitted solution
- URBNG-402 - [WP] Provide mock-up functionality in GameWebService to submit solution
- URBNG-401 - [WP] Handle solution status changes in a View/ViewModel
- URBNG-403 - [WP] Provide submit solution in a View/ViewModel
- URBNG-405 - [WP] Change database structure to support multiple answer ABCD
- URBNG-406 - [WP] Provide unit tests for the new database structure
- URBNG-407 - [WP] Provide mock implementation of the new database structure

Also:
- provided gps location
- generic functions to test database relations in entities and interface implementations