Bug 35242: Force memcache restart after koha upgrade

Bug 35242: Force memcache restart after koha upgrade

to test..

1/ install koha-common
    $ sudo apt install koha-common

2/ start memcached, check PID
    $ sudo service memcached start
    $ sudo systemctl status  memcached | grep PID
        Main PID: 52851 (memcached)

3/ build and install new koha-common package (will trigger a restart)
    $ sudo apt install ./koha-common-git+deadbeef.deb

5/ check that memcache is started, and has new PID (52900)
    $ sudo systemctl status  memcached | grep PID
        Main PID: 52900 (memcached)

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>