volser: Delete timed-out temporary volumes

volser: Delete timed-out temporary volumes

When a transaction times out on a volume, delete the volume if it is a
temporary volume (destroyMe is set). This prevents half-created
volumes from accumulating, which can take up space and screw up
certain vol ops in some versions.

Change-Id: I94e9adc767b84a2a32d980f508af33b823560950
Reviewed-on: http://gerrit.openafs.org/2760
Tested-by: Andrew Deason <adeason@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>