Implement the use of tickets in ils.  A read (or write) ticket can now
be used to access collection information.

In addition to setting up the session ticket for 'ils', an extension
was made in the general-query code to handle queries on
parent-collections.  This was needed so that listing a collection with
a ticket will not only list the data-objects but also the sub-collections.



git-svn-id: svn://irodssvn.ucsd.edu/trunk@5376 ea137bd6-aa86-47b6-b90d-b101d9f19a90