tests: Extract realm name and string_id values in variables.

This is a prep commit so that we can use these variables to
verify the urls in next commit.

zerver/tests/test_management_commands.py

@@ -323,15 +323,17 @@ class TestGenerateRealmCreationLink(ZulipTestCase):
     @override_settings(OPEN_REALM_CREATION=False)
     def test_generate_link_confirm_email(self) -> None:
         email = "user1@test.com"
+        realm_name = "Zulip test"
+        string_id = "zuliptest"
         generated_link = generate_realm_creation_url(by_admin=False)
 
         result = self.client_post(
             generated_link,
             {
                 "email": email,
-                "realm_name": "Zulip test",
+                "realm_name": realm_name,
                 "realm_type": Realm.ORG_TYPES["business"]["id"],
-                "realm_subdomain": "zuliptest",
+                "realm_subdomain": string_id,
             },
         )
         self.assertEqual(result.status_code, 302)

zerver/tests/test_signup.py

@@ -1543,7 +1543,7 @@ class RealmCreationTest(ZulipTestCase):
         password = "test"
         string_id = "zuliptest"
         email = "user1@test.com"
-        realm_name = "Test"
+        realm_name = "Zulip test"
 
         # Make sure the realm does not exist
         with self.assertRaises(Realm.DoesNotExist):
@@ -1551,7 +1551,7 @@ class RealmCreationTest(ZulipTestCase):
 
         # Create new realm with the email
         result = self.submit_realm_creation_form(
-            email, realm_subdomain=string_id, realm_name="Zulip test"
+            email, realm_subdomain=string_id, realm_name=realm_name
         )
         self.assertEqual(result.status_code, 302)
         self.assertTrue(