Fix import command/only update if same folder

[lthievenaz-keeper]

Consider this CSV:
,Administrator,administrator,pass123,,,INFRA
Which imports this content:

INFRA/
  └ Administrator
        ├ login: administrator
        └ password: pass123

I wish to run an import that updates this record + adds another administrator login in a different path:

DEV/
  └ Administrator
        ├ login: administrator
        └ password: pass789

,Administrator,administrator,pass456,,,INFRA
,Administrator,administrator,pass789,,,DEV
So I run:
import --format csv --update my_csv.csv
However this causes the following problems:

• Because the DEV admin has the same hash as the INFRA admin, we don't create a new record but instead a shortcut from INFRA to DEV
• This leads to the INFRA admin and DEV admin records having the same record (pass789)

This commit introduces change to the import process so that:

• If the --update flag is used, the record will only be updated if it's in the same folder
• If it's in a different folder and doesn't match, a new record is created
• If it's in a different folder and is the same, a shortcut is still created.