👽️(mailboxes) fix mailbox creation after dimail api improvement

Latest dimail modification lead to a bug in our app, preventing mailbox creation
from working properly. I swapped old dimail url to new one, mirrored dimail
modification and fixed tests and tada!

src/backend/mailbox_manager/tests/api/mailboxes/test_api_mailboxes_create.py

@@ -79,10 +79,7 @@ def test_api_mailboxes__create_viewer_failure():
 
 @pytest.mark.parametrize(
     "role",
-    [
-        enums.MailDomainRoleChoices.OWNER,
-        enums.MailDomainRoleChoices.ADMIN,
-    ],
+    [enums.MailDomainRoleChoices.OWNER, enums.MailDomainRoleChoices.ADMIN],
 )
 def test_api_mailboxes__create_roles_success(role):
     """Users with owner or admin role should be able to create mailbox on the mail domain."""
@@ -139,10 +136,7 @@ def test_api_mailboxes__create_roles_success(role):
 
 @pytest.mark.parametrize(
     "role",
-    [
-        enums.MailDomainRoleChoices.OWNER,
-        enums.MailDomainRoleChoices.ADMIN,
-    ],
+    [enums.MailDomainRoleChoices.OWNER, enums.MailDomainRoleChoices.ADMIN],
 )
 def test_api_mailboxes__create_with_accent_success(role):
     """Users with proper abilities should be able to create mailbox on the mail domain with a
@@ -345,7 +339,6 @@ def test_api_mailboxes__domain_owner_or_admin_successful_creation_and_provisioni
         payload = json.loads(rsps.calls[1].request.body)
         assert payload == {
             "displayName": f"{mailbox_data['first_name']} {mailbox_data['last_name']}",
-            "email": f"{mailbox_data['local_part']}@{access.domain.name}",
             "givenName": mailbox_data["first_name"],
             "surName": mailbox_data["last_name"],
         }

src/backend/mailbox_manager/tests/test_models_mailboxes.py

@@ -246,12 +246,15 @@ def test_models_mailboxes__create_mailbox_success(mock_info, mock_error):
 
     # Logger
     assert not mock_error.called
-    assert mock_info.call_count == 1
+    assert mock_info.call_count == 2
     assert mock_info.call_args_list[0][0] == (
+        "Token succesfully granted by mail-provisioning API.",
+    )
+    assert mock_info.call_args_list[1][0] == (
         "Mailbox successfully created on domain %s",
         domain.name,
     )
-    assert mock_info.call_args_list[0][1] == (
+    assert mock_info.call_args_list[1][1] == (
         {
             "extra": {
                 "response": str(