Resolve "Die Statistiken sollten auch in ElasticSearch hinterlegt werden."

Related to #384 (closed)

src/main/java/at/ac/uibk/gitsearch/service/gitlab_events/GitlabEventService.java

@@ -934,8 +934,12 @@ public class GitlabEventService {
                     logger.warn("Team Event {} not handled", gitLabEvent.getEventName());
                 }
             } else {
-                logger.error("Cannot handle event {}", gitLabEvent.getEventName());
-                throw new MethodNotFoundException(gitLabEvent.getEventName(), null);
+                if ("repository_update".equals(gitLabEvent.getEventName())) {
+                    logger.debug("Ignoring event {}", gitLabEvent.getEventName());
+                } else {
+                    logger.error("Cannot handle event {}", gitLabEvent.getEventName());
+                    throw new MethodNotFoundException(gitLabEvent.getEventName(), null);
+                }
             }
         } catch (GitLabApiException | IOException e) {
             logger.error("Cannot process gitLab event {} ({})", gitLabEvent.getEventName(), gitLabEvent.getRequestUrl(), e);