[FIX] purchase_requisition,purchase_requisition_stock: Fix Test case

How to reproduce the problem:
- Install the purchase_requistion, purchase_requistion_stock, and any Localization modules such as l10n_be or l10n_in
  (apart from USD currency any localization module)
- error caught only when at the time of module installation but it must have a different currency_id apart from USD

https://watch.screencastify.com/v/1C7GQKHBASyiluGGkFfV

Cause of the problem:
 static values Currency USD cause the problem.
 the following module will be set the currency value
 l10n_be - EUR
 l10n_in - INR
 l10n_br - BRL
 when we installed the following modules then cls.env.user.company_id.currency_id values get changes accordingly

  will lead to this error
  Traceback (most recent call last):
  File /home/odoo/src/odoo/addons/purchase_requisition/tests/common.py, line 70, in setUpClass
    cls.env.user.company_id.currency_id = cls.env.ref(base.USD).id
  File /home/odoo/src/odoo/odoo/fields.py, line 1217, in __set__
    records.write({self.name: write_value})
  File /home/odoo/src/odoo/addons/account/models/company.py, line 301, in write
    raise UserError(_('You cannot change the currency of the company since some journal items already exist'))
  odoo.exceptions.UserError: You cannot change the currency of the company since some journal items already exist
opw-2945581

closes odoo/odoo#98512

Closes: https://github.com/odoo/odoo/pull/98174
X-original-commit: 70b7c57f7ea0a619a149461e0e738ddc25b822f6
Signed-off-by: William Henrotin (whe) <whe@odoo.com>

addons/purchase_requisition/tests/common.py

@@ -66,4 +66,3 @@ class TestPurchaseRequisitionCommon(common.TransactionCase):
         cls.res_partner_1 = cls.env['res.partner'].create({
             'name': 'Wood Corner',
         })
-        cls.env.user.company_id.currency_id = cls.env.ref("base.USD").id

addons/purchase_requisition_stock/tests/test_purchase_requisition_stock.py

@@ -58,7 +58,7 @@ class TestPurchaseRequisitionStock(TestPurchaseRequisitionCommon):
             'line_ids': [line1],
             'type_id': requisition_type.id,
             'vendor_id': vendor2.id,
-            'currency_id': self.env.ref("base.USD").id,
+            'currency_id': self.env.user.company_id.currency_id.id,
         })
         requisition_blanket.action_in_progress()
 
@@ -144,13 +144,13 @@ class TestPurchaseRequisitionStock(TestPurchaseRequisitionCommon):
             'line_ids': [line1],
             'type_id': requisition_type.id,
             'vendor_id': vendor1.id,
-            'currency_id': self.env.ref("base.USD").id,
+            'currency_id': self.env.user.company_id.currency_id.id,
         })
         requisition_2 = self.env['purchase.requisition'].create({
             'line_ids': [line2],
             'type_id': requisition_type.id,
             'vendor_id': vendor1.id,
-            'currency_id': self.env.ref("base.USD").id,
+            'currency_id': self.env.user.company_id.currency_id.id,
         })
         requisition_1.action_in_progress()
         requisition_2.action_in_progress()