hadoop bindings: fix redfish_utimes invocation a bit
hadoop bindings: fix redfish_utimes invocation a bit

Technically, should use RF_INVAL_TIME to indicate an invalid timestamp.

Signed-off-by: Colin McCabe <3142ce8a0bdba4a38073365893e6b74f72d9c512@alumni.cmu.edu>

cmccabe/redfish,cmccabe/redfish,cmccabe/redfish,cmccabe/redfish,cmccabe/redfish