func tests: Allow test_etag_quoter to be run multiple times
func tests: Allow test_etag_quoter to be run multiple times

Change-Id: Ifb1d091e58b9331b027edf981f6af5c015b56936

openstack/swift,swiftstack/swift,tipabu/swift,tipabu/swift,openstack/swift,swiftstack/swift,tipabu/swift,openstack/swift,tipabu/swift,openstack/swift,swiftstack/swift