Bug 6801: checkoverdues returns unnecessary fields, causing slowness

Bug 6801: checkoverdues returns unnecessary fields, causing slowness

Explicitly specifies which fields to return in C4::Overdues::checkoverdues
SQL:  all of biblio, items, and issues, and everything in biblioitems
EXCEPT marc, marcxml and timestamp.

Bug 6801: member details page taking long time to load when many checkouts present

This patch removes the call to GetMemberDetails in build_issue_data; this heavy-weight
subroutine was being run for every single item a patron (or their relatives) have checked out.
Instead, the borrowers first name, surname and cardnumber are added to the GetPendingIssues query.
I believe this is reasonable since GetPendingIssues can now return issues for multiple borrowers.

Also corrects the $borrowernumber used for GetIssuesCharges and CanItemBeRenewed; was using the borrower whose
page we were on, NOT the borrower of that specific item (which would be different in the Relatives Checkouts tab).

Template calls to [% scope.borrowername %] are now broken up into [% scope.firstname %] [% scope.surname %].

Signed-off-by: Liz Rea <lrea@nekls.org>
On my test data, a patron with 180 checkouts (without this patch) would take more than a minute to bring back the circulation.pl and moremember.pl pages.
With this patch, the time is reduced to 5 or so seconds.

Big ups to Ian for tenaciously hunting this one down.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>