Correctly process missing refreshable_until token info
If refreshable_until=None, it ends up not getting stored in the token
information table.
This will make sure we will correctly interpret that as "no expiry".
Fixes: #264
Merges: #281
Signed-off-by: Patrick Uiterwijk <puiterwijk@redhat.com>
Reviewed-by: Randy Barlow <randy@electronsweatshop.com>
Reviewed-by: Howard Johnson <merlin@merlinthp.org>