bug 3435: SIP2 - 3M extension for SmartChute checkin.

bug 3435: SIP2 - 3M extension for SmartChute checkin.

Implement the optional fields: CR CS CT CV CY and DA.
Also silenced some outstanding debugging print statements.
Consolidated similar accesseor subs in Patron.pm to use x_items.
Adjust SIP tests to specify correct AP (location).  Add a 3rd item
to SIPtext.pm for later use.

Note CT (destination) is currently populated with destination branch code.
We can adjust that to be destination branch name, or some combination in
a subsequent patch if necessary.

This work was sponsored by the Northeast Kansas Library system.

Signed-off-by: Galen Charlton <galen.charlton@liblime.com>