Fix race in test_server.TestObjectController.test_PUT_ssync_multi_frag
Fix race in test_server.TestObjectController.test_PUT_ssync_multi_frag

If the test ran across a one second boundary it would fail because while
the timestamp normalization was doing some rounding it was making no
attempt to reuse the same timestamp on subsequent requests.

Change-Id: Ic560032bcfacd6f0d10cfc0f4f10e5d6c2bc8dd5

hurricanerix/swift,psachin/swift,hbhdytf/mac2,larsbutler/swift,notmyname/swift,hurricanerix/swift,bkolli/swift,hbhdytf/mac,swiftstack/swift,zackmdavis/swift,dencaval/swift,openstack/swift,mjwtom/swift,matthewoliver/swift,matthewoliver/swift,bkolli/swift,larsbutler/swift,swiftstack/swift,openstack/swift,Akanoa/swift,gold3bear/swift,notmyname/swift,rackerlabs/swift,tipabu/swift,wenhuizhang/swift,williamthegrey/swift,notmyname/swift,mjzmjz/swift,clayg/swift,redhat-openstack/swift,aerwin3/swift,tipabu/swift,matthewoliver/swift,redbo/swift,levythu/swift,psachin/swift,redbo/swift,psachin/swift,Em-Pan/swift,prashanthpai/swift,smerritt/swift,clayg/swift,Em-Pan/swift,takeshineshiro/swift,hurricanerix/swift,nadeemsyed/swift,openstack/swift,zackmdavis/swift,daasbank/swift,nadeemsyed/swift,revoer/keystone-8.0.0,swiftstack/swift,psachin/swift,hbhdytf/mac2,shibaniahegde/OpenStak_swift,tipabu/swift,nadeemsyed/swift,smerritt/swift,mjzmjz/swift,dencaval/swift,Akanoa/swift,clayg/swift,redhat-openstack/swift,shibaniahegde/OpenStak_swift,bouncestorage/swift,notmyname/swift,matthewoliver/swift,takeshineshiro/swift,prashanthpai/swift,tipabu/swift,hbhdytf/mac2,gold3bear/swift,bouncestorage/swift,nadeemsyed/swift,williamthegrey/swift,thiagodasilva/swift,levythu/swift,bradleypj823/swift,hbhdytf/mac2,openstack/swift,rackerlabs/swift,smerritt/swift,bradleypj823/swift,wenhuizhang/swift,hbhdytf/mac,smerritt/swift,thiagodasilva/swift,hurricanerix/swift,revoer/keystone-8.0.0,daasbank/swift,aerwin3/swift,mjwtom/swift,clayg/swift