Recenter builder test expectation around random variance
Recenter builder test expectation around random variance

... in order to make the test pass with more seeds and fail less
frequently in the gate.

Change-Id: I059e80af87fd33a3b6c0731fbad62e035215eca5

matthewoliver/swift,swiftstack/swift,smerritt/swift,openstack/swift,smerritt/swift,tipabu/swift,smerritt/swift,tipabu/swift,openstack/swift,tipabu/swift,matthewoliver/swift,smerritt/swift,swiftstack/swift,matthewoliver/swift,swiftstack/swift,openstack/swift,matthewoliver/swift,tipabu/swift,openstack/swift