curl commands in installer should have a --noproxy list

[Chris Tjepkema]

traf_config_setup prompts for external network URL (including port)

Often the default is <the result of hostname -f>:port

This may not work on sandboxes and on hosts where hostname -f is not known by an external dns server
if http_proxy is set so curl commands using hostname or local host could fail.

If the curl commands use --noproxy locahost,127.0.0.1,$(hostname),$(hostname–f)

then the user can enter localhost or `hostname` and the curl commands for reconfiguring in trafodion mods will still work.