[tbs_plugins] Migrated the sma-walsh plugin to use DSM.

This means grabbing the Walsh patterns over DSM instead of from the user
over KATCP. Also, grabs the Walsh sync time instead of over the command
line.
[tbs_plugins] Migrated the sma-astro plugin to use DSM.

It now grabs the SMA-derived delay-triplets and source RA, etc, from
the DDS server over DSM instead of from user-controllable tcpborphserver
commands.
Merge remote branch 'origin/master'

Conflicts:
	tbs_plugins/Makefile