9.4.x: Update example hotrod-client.properties

https://access.redhat.com/documentation/en-us/red_hat_data_grid/7.3/html-single/red_hat_data_grid_user_guide/index#configuration_10

Provide valid example of hotrod-client.properties. Current example is out of date. e.g.

infinispan.client.hotrod.transport_factory = org.infinispan.client.hotrod.impl.transport.tcp.TcpTransportFactory