Bug 18349: If a confirmation is required, consider as blocker

Bug 18349: If a confirmation is required, consider as blocker

Only RENEW_ISSUE should not be considered as blocker, others should.
Note that this code is not robust and the whole script as well as the
return of CanBookBeIssued should be rewrittent completely.
We need a small patch to easy backport to stable releases

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit d28d5a280d590bb19afbea23705802aa46af5e6d)
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>