Code review comment for ~raharper/cloud-init:systemd_export_tz

merged in the suggestion above
--- a/cloudinit/cmd/main.py
+++ b/cloudinit/cmd/main.py
@@ -694,4 +694,6 @@ def main(sysv_args=None):

 if __name__ == '__main__':
+ if 'TZ' not in os.environ:
+ os.environ['TZ'] = ":/etc/localtime"
     main(sys.argv)