Bug 10110: Problems with diacritics in saved SQL reports

Bug 10110: Problems with diacritics in saved SQL reports

Adds decoding for cgi params (for completeness).
Apparently, the NAME attribute of DBI statement handle has a UTF8 bug.
Fixing this by decoding the returned column names.
Did this in a shared routine.

http://bugs.koha-community.org/show_bug.cgi?id=10110
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Copying test plan from bug report:

Example SQL:
select
branchname as "Bibliothek (üöä)",
branchname "Bibiothek (üäa)",
branchname
from branches where branchcode = <<Bibliothekskürzel|branches>>

1) Create report with given example SQL or your own including
   some diacritics in the columnnames
2) Save the report and run it
3) Verify column names are broken before patch, but fixed after..

All tests and QA script pass.

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>