Skip setattr if the create has already handled them.
Most of the clients only set mode with create and all other attributes
are set to deafault.
An extra setattr call will be made only if the client wants to use non
default values.

Ported from 1.5 459d915c326e5bb33f270345b49ccd621e2ee795

Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>
Signed-off-by: Frank S. Filz <ffilzlnx@mindspring.com>