Merge branch 'M2_roles_statistics' into 'milestone-2'

.../src/main/java/cz/muni/fi/pa165/core/DataInitializer.java

.../src/main/java/cz/muni/fi/pa165/core/company/Company.java

core/src/main/java/cz/muni/fi/pa165/core/house/House.java

core/src/main/java/cz/muni/fi/pa165/core/user/User.java

.../main/java/cz/muni/fi/pa165/core/user/UserController.java

.../main/java/cz/muni/fi/pa165/core/user/UserRepository.java

...src/main/java/cz/muni/fi/pa165/core/user/UserService.java

...main/java/cz/muni/fi/pa165/core/user/roles/AdminRole.java

...in/java/cz/muni/fi/pa165/core/user/roles/CompanyRole.java

...main/java/cz/muni/fi/pa165/core/user/roles/HouseRole.java

.../src/main/java/cz/muni/fi/pa165/core/user/roles/Role.java

...java/cz/muni/fi/pa165/core/user/roles/RoleController.java

...ain/java/cz/muni/fi/pa165/core/user/roles/RoleFacade.java

...ain/java/cz/muni/fi/pa165/core/user/roles/RoleMapper.java

...java/cz/muni/fi/pa165/core/user/roles/RoleRepository.java

...in/java/cz/muni/fi/pa165/core/user/roles/RoleService.java

...n/java/cz/muni/fi/pa165/core/user/roles/RoleTypeEnum.java

core/src/main/resources/application.properties

core/src/main/resources/application.yml

...ava/cz/muni/fi/pa165/core/company/UnitTestCompanyJPA.java