Remove Swift location/password from messages.

Updates several exceptions and log messages in the Swift backend
so that they don't include Swift location URI's which may contain
passwords when used in Swift single tenant mode.

Fixes LP Bug #1098962.

Change-Id: I458de58563343347d5c976fe1ad084cc7e3280eb
Ensure swift_store_admin_tenants ACLs are set

When using the V1 api ensure that admin tenant ACLs are set
correctly on the relevant swift container.

Fixes bug 1109089.

Change-Id: I275e8aa7d2f02859c0d9ddbf373a0ae51e81e53d
Merge "Ensure swift_store_admin_tenants ACLs are set"