Follow-up of story #8528

The purpose of this story is to desactivate accounts that were created "just for import"

• At import, accounts are created with a reference to a DB table
  • Table format:
    • import date
    • who run the import
    • previous status (if any)
    • when the account was "restored" (this is useful to detect pending users if process abort with fatal error or segfault, etc)
  • If accounts already exists but not with an active status, they are temporarly activated (keep track in table) but password is "unactivated" (for instance add !! in front of hash)
• After the import is completed or in case of catchable error (Exception)
  • Accounts that were created are turned off (Deleted)
  • Accounts that were temporarly activated are reset to their original state
    • Password is restored