Bug 10900 - Incorrect calling conventions accessing C4::Context

Bug 10900 - Incorrect calling conventions accessing C4::Context

There were multiple calling conventions for C4::Context's
set_userenv routine. So the following commands were used to
find discrepancies:
    grep "::set_userenv" `find .`
    grep "\->set_userenv" `find .`

The first grep demonstrated that the smaller change is from
:: to -> as only C4/Auth.pm, installer/InstallAuth.pm, and
t/db_dependent/Circulation.t would need to be modified. This
patch corrects C4::Context's set_userenv routine to be object
call based (use ->) by using a shift to ignore the first
parameter, and modify the three files found with :: calls.

As the result of trying to roll a distribution,
t/Circulation_barcodedecode.t was discovered to be faulty. The
cause being incorrect parameters! This was hidden when there
was no shift in the set_userenv routine. However, with its
correction, the test broke.

This led me to read the POD documentation for the function
set_userenv in C4::Context and realize it was outdated as
well. It has been revised to match the current version of
the function.

Then intentionally bad parameters passed to the set_userenv
routine in C4::Context were hunted down. The biggest problems
were missing surnames or branch names.

Rebase required because of shibboleth change in C4/Context.pm

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>