Make openid storage symlink also for Headpin

Katello-common is shared among Katello and Headpin so it makes more
sense to have openid symlink in there.
Add missing files to headpin package
Merge pull request #2224 from ares/bug/2164

Make openid storage symlink also for Headpin
961293 - Fixing broken response
Merge pull request #2227 from daviddavis/temp_1368099072

961293 - Fixing broken response
Merge pull request #2225 from iNecas/headpin-spec-fix

Add missing files to headpin package