Windows; release BIOD after status merge

Windows; release BIOD after status merge

Releasing the BIOD permits the accumulated buffers to be accessed.
Releasing the BIOD before the cm_MergeStatus() call creates a
window where the buffer data version is larger than the cm_scache
data version.  Release the BIOD after the status merge.

Reviewed-on: http://gerrit.openafs.org/6598
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>
(cherry picked from commit 111de76ea8dac713247c99ebe2182ae16cc0a3c0)

Change-Id: I7c8dd9f3e22e83b82679b9d3a4ee3aa5f45a49aa
Reviewed-on: http://gerrit.openafs.org/6824
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>