fixed usercontroller test

src/main/java/ntnu/idatt2016/v233/SmartMat/controller/user/UserController.java

@@ -11,6 +11,8 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.ArrayList;
+
 
 /**
  * The user controller is responsible for handling requests related to users.
@@ -69,6 +71,7 @@ public class UserController {
                 .lastName(user.lastName())
                 .dateOfBirth(user.birthDate())
                 .enabled(true)
+                .authorities(new ArrayList<>())
                 .build();
         userService.saveUser(newUser);
         userService.addAuthorityToUser(newUser.getUsername(), Authority.USER);

src/main/java/ntnu/idatt2016/v233/SmartMat/entity/user/User.java

@@ -87,7 +87,7 @@ public class User implements UserDetails {
             joinColumns = @JoinColumn(name = "username"),
             inverseJoinColumns = @JoinColumn(name = "authority"))
     @JsonIgnoreProperties({"users"})
-    private List<AuthorityTable> authorities;
+    private List<AuthorityTable> authorities = new ArrayList<>();
 
 
     /**