Bug 32942: Suggestion API route when non 'standard' status are present

Bug 32942: Suggestion API route when non 'standard' status are present

The API route for listing all suggestion:

/api/v1/suggestions

send back an error message when there is a suugestion with non standard
status (ASKED, CHECKED, ACCEPTED, REJECTED).

This patch fixes this too restrictive restriction.

TO TEST:

1. Add a status in SUGGEST_STATUS AV list.
2. Create a suggestion, and assign it to the previsous status.
3. Call /api/v1/suggestion
3. You get an error message:
   {
    "errors": [ {
      "message":"Not in enum list: ASKED, CHECKED, ACCEPTED, REJECTED.",
      "path":"\/1\/status"
    }],
    "status":200
   }
4. Apply the patch. Call /api/v1/suggestion

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 3dc9bf900bd666eb17272060e071422a35267ada)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>