Upgrade test-client when switching from FBThrift to Apache Thrift

[spladug]

The old script looked like

#!/bin/sh

# this is a wrapper around the simple command line client the thrift compiler
# generates for this service. it assumes the server is running locally on port
# 9100. run it to see more usage details.
exec python3 -m my_service.my_service_thrift.remote -h localhost:9000 "$@"

but the remote moved and got a little messier so should now look like

#!/bin/sh

# this is a wrapper around the simple command line client the thrift compiler
# generates for this service. it assumes the server is running locally on port
# {{ cookiecutter.port }} as in the OneVM. run it to see more usage details.
if [ "$#" -gt 0 ]; then
    exec my_service/my_service_thrift/MyService-remote -h localhost:9000 "$@"
else
    # we need to pass exactly 0 args to get docs. the -h with nothing else
    # causes a crash.
    exec my_service/my_service_thrift/MyService-remote -h localhost:9000
fi