test: Do not overwrite frappe.form_dict to retain proxy reference

Set frappe.local.form_dict instead
diff --git a/erpnext/buying/doctype/request_for_quotation/test_request_for_quotation.py b/erpnext/buying/doctype/request_for_quotation/test_request_for_quotation.py
index dcdba09..064b806 100644
--- a/erpnext/buying/doctype/request_for_quotation/test_request_for_quotation.py
+++ b/erpnext/buying/doctype/request_for_quotation/test_request_for_quotation.py
@@ -65,7 +65,6 @@
 		)
 		sq.submit()
 
-		frappe.form_dict = frappe.local("form_dict")
 		frappe.form_dict.name = rfq.name
 
 		self.assertEqual(check_supplier_has_docname_access(supplier_wt_appos[0].get("supplier")), True)
diff --git a/erpnext/quality_management/doctype/quality_procedure/test_quality_procedure.py b/erpnext/quality_management/doctype/quality_procedure/test_quality_procedure.py
index a26ce23..04e8211 100644
--- a/erpnext/quality_management/doctype/quality_procedure/test_quality_procedure.py
+++ b/erpnext/quality_management/doctype/quality_procedure/test_quality_procedure.py
@@ -19,7 +19,7 @@
 				)
 			).insert()
 
-			frappe.form_dict = frappe._dict(
+			frappe.local.form_dict = frappe._dict(
 				doctype="Quality Procedure",
 				quality_procedure_name="Test Child 1",
 				parent_quality_procedure=procedure.name,
diff --git a/erpnext/tests/test_exotel.py b/erpnext/tests/test_exotel.py
index 67bc5bdb..bb916a8 100644
--- a/erpnext/tests/test_exotel.py
+++ b/erpnext/tests/test_exotel.py
@@ -8,7 +8,6 @@
 class TestExotel(FrappeAPITestCase):
 	@classmethod
 	def setUpClass(cls):
-		frappe.form_dict = frappe._dict()
 		cls.CURRENT_DB_CONNECTION = frappe.db
 		cls.test_employee_name = make_employee(
 			user="test_employee_exotel@company.com", cell_number="9999999999"