Use swiftclient Connections in sharding probe tests
Use swiftclient Connections in sharding probe tests

This gets us retries "for free" and should reduce gate flakiness.

Change-Id: Ia2e4c94f246230a3e25e4557b4b2c1a3a67df756

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