Windows: RDR_GetVolumeInfo do not always return success

If the call failed because all servers are down or all instances
of the volume are offline or busy, tell the caller.  Do not return
fake data.

Reviewed-on: http://gerrit.openafs.org/9882
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 2608ce67f1ba5ed1ed63525fad90db9d67547ec6)

Change-Id: Idbcac1678453e5538ecda4a0744cbca79f69c4e9
Reviewed-on: http://gerrit.openafs.org/9885
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Windows: 1.7.24 Change Log

Change-Id: I3293c21ccf3fbf9cdc5eed851df4c23f8316f3ea
Reviewed-on: http://gerrit.openafs.org/9873
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>