Please review: [389 Project] #533: only scan for attributes to decrypt if there are encrypted attrs configured

[Noriko Hosoi]

https://fedorahosted.org/389/ticket/533

https://fedorahosted.org/389/attachment/ticket/533/0001-Ticket-533-only-scan...

Bug description: When an internal entry is created in id2entry,
  all attributes are scanned in attrcrypt_decrypt_entry() and
  checked if they need to be decrypted regardless of SSL configured
  on the server or not.

Fix description: In attrcrypt_encrypt_* and attrcrypt_decrypt_*
  functions, this patch checks the attrcrypt_configured flag.
  It goes scanning the attribute list only when the encrypt_
  configured flag is set to true.