testckpt.c, ckpt-rd.c, ckpt-wr:
add default section to testcase.
ckpt.c:
Add default section support to checkpoints.

BKrev: 425aeb47Mb_N8HKGtX_BdmRGaLP-Jg


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@582 fd59a12c-fef9-0310-b244-a6a79926bd2f