OpenNebula

This is issue is for the Datastore documentation. Originally reported by Matthew Patton in the mailing list:

The documentation is sure plentiful but it really needs a fact and consistency checker. The rampant use of '/var/lib/one/datastores' in particular needs to be excised everywhere and replaced with $DATASTORE_LOCATION because there is a huge difference between what the front-end is doing with it and what the Host is using it for, or so the documentation seems to imply.

Fix 'onedatastore show <#>' such that "BASE PATH" to use
the literal string '$DATASTORE_LOCATION' or the current value of the
variable as 'oned' understands it to be (see /var/lib/one/config). Always
returning '/var/lib/one/datastores/...' is wrong. Better yet the value
should be auto-generated unless the user has hard-coded it. Currently it
appears there is no way for me to force it to be an arbitrary value. This is
particularly pertinent when dealing with VMware since VMFS are located at
'/vmfs/volumes' and since there is no persistence, any hackery like creating
'/var/datastores/<#>' isn't going to survive a reboot.