acl: Skip acl check for all requests of Account.

The Amazon S3 ACL only manage access to buckets and objects.
Skip all requests of swift account to do S3 ACL check (retrive
all permission from "x-container-sysmeta-swift3-acl' of swift
account). To avoid proxy return 500 internal server error.

Change-Id: I14ca895a08a1b0abe849442e73b3c8685f957117
Closes-Bug: #1402493
Merge "acl: Skip acl check for all requests of Account."