[PORTTISK-1229] inheritance added to Oskari classes
[PORTTISK-1229] inheritance added to Oskari classes

uhef/Oskari-Routing-frontend,uhef/Oskari-Routing-frontend,uhef/Oskari-Routing-frontend,uhef/Oskari-Routing-frontend,uhef/Oskari-Routing-frontend,uhef/Oskari-Routing-frontend