Making get_ip reusable

We want to introduce a new flag to quickly capture the intended IPs on
the cluster, and for that we want to reuse this small piece of logic. It
will probably also be handy in the long-term.

Signed-off-by: Rodrigo Tobar <rtobar@icrar.org>

dlg/deploy/pawsey/start_dfms_cluster.py

@@ -247,9 +247,12 @@ def get_pg(opts, nms, dims):
         json.dump(pg, f)
     return pg
 
-def get_remote(opts):
+def get_ip(opts):
     find_ip = get_ip_via_ifconfig if opts.use_ifconfig else get_ip_via_netifaces
-    my_ip = find_ip(opts.interface)
+    return find_ip(opts.interface)
+
+def get_remote(opts):
+    my_ip = get_ip(opts)
     if opts.remote_mechanism == 'mpi':
         return remotes.MPIRemote(opts, my_ip)
     elif opts.remote_mechanism == 'dlg':