Do not yield any default caches in the top level cccol implementation.
In the FILE type, yield the default cache if it exists and is of type
FILE, instead of yielding the set of open file caches.

https://github.com/krb5/krb5/commit/45360c9688ca963f75a2480f2cf818424fc3dc7b
Commit By: ghudson
Revision: 25156
Changed Files:
U   trunk/src/lib/krb5/ccache/Makefile.in
U   trunk/src/lib/krb5/ccache/cc_file.c
U   trunk/src/lib/krb5/ccache/cccursor.c
A   trunk/src/lib/krb5/ccache/t_cccol.py
U   trunk/src/lib/krb5/ccache/t_cccursor.c