EZP-20822: fixed phpdoc parameter hints for API service interfaces
EZP-20822: SectionService: fixed phpdoc and input validation
EZP-20822: LanguageService: fixed phpdoc and input validation
EZP-20822: ObjectStateService: fixed input validation
EZP-20822: UserService: fixed phpdoc and input validation
EZP-20822: fixed creating SPI Location with right type of data
EZP-20822: Trashservice: fixed phpdoc and input validation
EZP-20822: LocationService: fixed phpdoc and input validation
EZP-20822: ContentService: fixed phpdoc and input validation
EZP-20822: ContentTypeService: fixed phpdoc and input validation
EZP-20822: RoleService: fixed phpdoc and input validation
CS: Removed extra empty line
Fixed some phpdoc errors
Fixed updating Role with same identifier
Merge pull request #351 from ezsystems/fix-20822-service-phpdoc-input-validation

Fix EZP-20822: API services phpdoc and input validation