plugin : has_feature : copy

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
rbd : has_feature : copy

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
sheppdog : has_feature : copy

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
nexenta : has_feature : copy

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
lvm : has_feature : copy

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
iscsidirect : has_feature : copy

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
iscsi : has_feature : copy

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>