async fixes for nodeconfig and netutil

confluent_client/bin/nodeconfig

@@ -263,7 +263,7 @@ async def main():
                     options.restoredefault))
             sys.exit(1)
     if setmode:
-        session.stop_if_noderange_over(noderange, options.maxnodes)
+        await session.stop_if_noderange_over(noderange, options.maxnodes)
         if options.exclude:
             sys.stderr.write('Cannot use exclude and assign at the same time\n')
             sys.exit(1)
@@ -287,7 +287,7 @@ async def main():
         # well, we want to expand things..
         # check ipv4, if requested change method to static
         for path in updatebypath:
-            for fr in session.update('/noderange/{0}/{1}'.format(noderange, path),
+            async for fr in session.update('/noderange/{0}/{1}'.format(noderange, path),
                                     updatebypath[path]):
                 rcode |= client.printerror(fr)
                 for node in fr.get('databynode', []):

confluent_server/confluent/netutil.py

@@ -728,7 +728,7 @@ async def get_nic_config(configmanager, node, ip=None, mac=None, ifidx=None,
                     cfgdata['ipv{}_gateway'.format(nver)] = socket.inet_ntop(fam, candgwn)
         return noneify(cfgdata)
     if ip is not None:
-        for prefixinfo in await get_prefix_len_for_ip(ip):
+        async for prefixinfo in get_prefix_len_for_ip(ip):
             fam, prefix = prefixinfo
             ip = ip.split('/', 1)[0]
             if fam == socket.AF_INET: