Add threadless RPC support to other connectors

These connectors check the number of threads on the TO end of the
connector definition and then swich which RPC template they import
between the one that uses threads and the one that doesn't.

Update licenses

- s/D61/DATA61
- s/NICTA_BSD/DATA61_BSD
- comment out template licenses to avoid multiple licenses being
generated throughout templates

Add RPCDataport connector