Renamed admin role

src/main/java/de/w665/sharepulse/db/RethinkDBService.java

@@ -116,7 +116,7 @@ public class RethinkDBService {
             User user = new User();
             user.setUsername(defaultUsername);
             user.setPassword(passwordEncoder.encode(defaultPassword));
-            user.setRole("admin");
+            user.setRole("ADMIN");
             userRepository.insertUser(user);
             log.debug("Admin user created with default credentials. Username: admin, Password: admin");
         }