Bug 18957: Record the time part of the last renewed date

Bug 18957: Record the time part of the last renewed date

issues.lastreneweddate is a datetime and we could record the time part
of the date.

Test plan:
Renew an issue
note that the time part of the last renewed date is set correctly

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 4585228ea9b5cc407dcec8e4bae499d59007ea96)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>