ringaccount: (fix)sets the ringId/username for disabled accounts also

- Commit e57038fe...(ringaccount: sets the ringId/username for disabled
  accounts also) caused the deviceId to be loaded into ringAccountId_
  for disabled accounts. This patch load devices, contacts, and trust
  requests for disabled accounts while exiting from loadAccount as early
  as possible.

Change-Id: If45ab84ac301faa5776d6af5436e672195c51501