This reverts commita742569dc9. Commita742569dc9introduced serious performance issues. Our scale tests revealed ~20% degradation in various rally tests after this commit. Our experiments show that the current implementation does not scale well for a vCenter installation with 30 datastores which is a smaller size deployment for OpenStack clouds. The patch introduced a config option 'vmware_storage_profile'. When it is set, the driver makes periodic expensive PBM API calls which put lot of load on vCenter and the controller VM. Change-Id: I838c32277624db3b82db65d7ecfe81e2a779e99a
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