Resolve "Collections mehr hervorheben"

Related to #460 (closed)

src/main/java/at/ac/uibk/gitsearch/config/CacheConfiguration.java

@@ -52,6 +52,7 @@ public class CacheConfiguration {
             createCache(cm, at.ac.uibk.gitsearch.repository.jpa.UserRepository.USERS_BY_EMAIL_CACHE);
             createCache(cm, EditorialPagesService.PAGES_CACHE);
             createCache(cm, MetaDataRepository.EXERCISE_BY_ID_CACHE);
+            createCache(cm, MetaDataRepository.EXERCISECHILDREN_BY_ID_CACHE);
 
             createCache(cm, at.ac.uibk.gitsearch.domain.User.class.getName());
             createCache(cm, at.ac.uibk.gitsearch.domain.Authority.class.getName());