tests: Use local files for GFZ auto update checks

We don't (yet) ship the GFZ data files, so the normal tests will fail
because the files are not found. Uses the short test files instead so
that the checks can complete.

tests/test_gfz.py

@@ -63,11 +63,17 @@ def test_auto_update(mocker, tmpdir):
 	update_gfz(gfzpath_30d=os.path.join(tmpdir, "foo.dat"))
 	requests.get.assert_called_with(GFZ_URL_30D, stream=True)
 	# Should update the last-5-year data
-	gfz_daily(update=True, update_interval="1d")
+	gfz_daily(
+		gfzpath_all=GFZ_PATH_ALL, gfzpath_30d=GFZ_PATH_30D,
+		update=True, update_interval="1d",
+	)
 	requests.get.assert_called_with(GFZ_URL_30D, stream=True)
 	_assert_age(GFZ_PATH_30D, "10d")
 	with pytest.warns(UserWarning):
-		gfz_daily(update=False, update_interval="0h")
+		gfz_daily(
+			gfzpath_all=GFZ_PATH_ALL, gfzpath_30d=GFZ_PATH_30D,
+			update=False, update_interval="0h",
+		)
 
 
 def test_not_avail(mocker, tmpdir):