LP#1497335 Aged/All circulation API access

LP#1497335 Aged/All circulation API access

Various SQL, IDL, and API changes for accessing aged circulations,
primarily via all_circulation objects, for imporoved staff client
integration.

*. Support open-ils.pcrud access to the action.all_circulation DB view /
   'combcirc' class.

*. Add missing parent_circ, checkin_scan_time, checkin_workstation to
   combcirc class.

*. Add 'usr' field to combcirc.  The action.all_circulation VIEW will
   return NULL as the 'usr' column value when returning data for an
   aged_circulation.

*. Add virtual 'active_circ' and 'aged_circ' fields to combcirc for
   fleshing the related action.circulation or action.aged_circulation
   object.

* Adds SQL functions for action.all_circ_chain and
  action.summarize_all_circ_chain, which pull data from
  aged_circulation.

*. API calls
open-ils.circ.[prev_]renewal_chain.retrieve_by_circ[.summary] now return
data for active and aged circulations by using action.all_circ_chain and
action.summarize_all_circ_chain.  When using these APIs, a null value
in the 'usr' column is the indication that a given circulation or circ
chain summary represents an aged circulation.

* API open-ils.circ.copy_details.retrieve will now optionally return
  aged circ data within the copy circ history.

Signed-off-by: Bill Erickson <berickxx@gmail.com>