This patch add a notification when a share can not be mounted on the
compute host.
Manila is the OpenStack Shared Filesystems service.
These series of patches implement changes required in Nova to allow the shares
provided by Manila to be associated with and attached to instances using
virtiofs.
Implements: blueprint libvirt-virtiofs-attach-manila-shares
Change-Id: Idd44f5ad96c0a1dd62eba5d283e614c324854a80
René Ribaud