Fix thin provisioning flags in NetApp drivers

Fix thin provisioning flags in NetApp drivers

The Cinder scheduler expects thin provisioning support to be
reported by drivers as 'thin_provisioning_support' and
'thick_provisioning_support'. The NetApp Data ONTAP drivers
for iSCSI/FC incorrectly report those flags as
'thin_provisioned_support' and 'thick_provisioned_support'.
It's a trivial change to fix that.

Closes-Bug: #1532285
Change-Id: I84eb867b753e18825e619e16b4121b34230c06ee