Fix StopIteration noise in obj/test_replicator.py
Fix StopIteration noise in obj/test_replicator.py

Insufficient arguments are passed to create MockProcess instances
resulting in StopIteration errors being raised during the repeated
replicator run_once cycles added in [1].  The test passes because
the replicator just logs these exceptions, but the logger noise is
distracting when running the test [2].

[1] Related-Change: Ib5c9dd17e40150450ec57a728ae8652fbc730af6
[2] nosetests ./test/unit/obj/test_replicator.py:\
TestObjectReplicator.test_run_once -s

Change-Id: I36208e93c81744068a3454577a30d0c5a8d9cb9b

swiftstack/swift,openstack/swift,notmyname/swift,smerritt/swift,tipabu/swift,notmyname/swift,clayg/swift,nadeemsyed/swift,openstack/swift,matthewoliver/swift,clayg/swift,psachin/swift,openstack/swift,psachin/swift,nadeemsyed/swift,smerritt/swift,tipabu/swift,swiftstack/swift,matthewoliver/swift,psachin/swift,notmyname/swift,smerritt/swift,smerritt/swift,tipabu/swift,tipabu/swift,psachin/swift,notmyname/swift,matthewoliver/swift,openstack/swift,nadeemsyed/swift,swiftstack/swift,nadeemsyed/swift,clayg/swift,matthewoliver/swift,clayg/swift