Bug 29542: Prevent access to private list to non authorized users

Bug 29542: Prevent access to private list to non authorized users

The catalogue permission is not enough.

Test plan:
Create a private list owned by user A
Login with user B and hit (with XX the shelfid)
  /cgi-bin/koha/virtualshelves/sendshelf.pl?shelfid=XX

You should get an error message "You do not have sufficient permission
to continue."

Login with user A
=> You should be able to send the list

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 6ca49b550e54a0f1729c5d23838256a0e4542f91)
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
(cherry picked from commit 2c41540b3bca62f8194b8392a283325411780ace)

Signed-off-by: Wainui Witika-Park <wainuiwitikapark@catalyst.net.nz>