Merge pull request #111 from arekkas/master

Fixed an issue where identityroles would not get properly converted to string.

src/ZfcRbac/Service/AuthorizationService.php

@@ -250,8 +250,12 @@ protected function flattenRoles(array $roles)
             if (in_array($role, $flattenedRoles)) {
                 continue;
             }
-
-            $flattenedRoles[] = $role;
+
+            if ($role instanceof RoleInterface) {
+                $flattenedRoles[] = $role->getName();
+            } else {
+                $flattenedRoles[] = $role;
+            }
 
             if ($this->rbac->hasRole($role)) {
                 $roleFromRbac = $this->rbac->getRole($role);