Bug 15091: Do not allow to use batch checkout if checkout is not allowed
If the noissue param is passed to the template, the batch checkout
should not be allowed.
This patch globally fixes the problem raised by bug 15091.
A generic message "cannot check out" is displayed and some more specific
ones could be added later.
For now it only trigger the "fine balance is over the limit" message.
Test plan:
Confirm there is no regression on the original behavior and that the
issue raised on bug 15091 is fixed.