Support more than 9 portals

Summary: If portal is created with id > 9 - then those portals are not reachable and always return 404.

Test Plan: Create at least 10 portals, 10th and rest of them will no longer return 404.

Reviewers: epriestley, Pawka, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D20852