10039: Fix imports test for non-US locales

gramps/plugins/test/imports_test.py

@@ -25,6 +25,7 @@ import unittest
 import os
 import sys
 import re
+import locale
 from time import localtime, strptime
 from unittest.mock import patch
 #import logging
@@ -49,6 +50,9 @@ TEST_DIR = os.path.abspath(os.path.join(DATA_DIR, "tests"))
 #  Local Functions
 # ------------------------------------------------------------------
 
+# These tests assume a US date and time format.
+locale.setlocale(locale.LC_ALL, 'en_US.utf8')
+
 def mock_time(*args):
     """
     Mock up a dummy to replace the varying 'time string results'