Simplify ContainerBroker._get_shard_range_rows()
Simplify ContainerBroker._get_shard_range_rows()

Change-Id: I28ad07091f7fd20c48b245e5bd21bb7eb4ae55cf
Related-Change: I2f7d1bc698ff4c0734ab48eb29e252d6acb1abc6

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