Merge branch '39-trip-service-kata' into 'master'

.gitlab-ci.yml

README.md

package-lock.json

package.json

trip-service-kata/.gitlab-ci.yml

trip-service-kata/pom.xml

trip-service-kata/readme.md

...a/org/craftedsw/tripservicekata/TripService_Original.java

.../tripservicekata/exception/CollaboratorCallException.java

...w/tripservicekata/exception/UserNotLoggedInException.java

...rc/main/java/org/craftedsw/tripservicekata/trip/Trip.java

...main/java/org/craftedsw/tripservicekata/trip/TripDAO.java

.../java/org/craftedsw/tripservicekata/trip/TripService.java

...c/main/java/org/craftedsw/tripservicekata/trip/Trips.java

...rc/main/java/org/craftedsw/tripservicekata/user/User.java

.../java/org/craftedsw/tripservicekata/user/UserSession.java

.../java/org/craftedsw/tripservicekata/trip/TripDAOTest.java

...a/org/craftedsw/tripservicekata/trip/TripServiceTest.java