Update parser for properties on zone objects

Create a service attribute that can be optionally defined on a group
denoting what service is hosting the group members. Initially, defining
a service name generates the group member(s) to be zone objects only.

This service attribute will be enhanced to specifically note what
service provides the group members and allow for a better trigger for
properties on zone objects instead of generating a blank signal match.

Tested:
    Blank signal match generated for group members in events used

Change-Id: I483fcf6a5e210e5d70bc9d5c4c0dee15524b01b9
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
diff --git a/control/templates/fan_zone_defs.mako.cpp b/control/templates/fan_zone_defs.mako.cpp
index fdf5bb2..a73449f 100644
--- a/control/templates/fan_zone_defs.mako.cpp
+++ b/control/templates/fan_zone_defs.mako.cpp
@@ -127,6 +127,8 @@
                         std::vector<Signal>{
                         %for s in event['pc']['pcsigs']:
                             Signal{
+                                %if ('match' in s) and \
+                                    (s['match'] is not None):
                                 match::${s['match']}(
                                 %for i, mp in enumerate(s['mparams']):
                                 %if (i+1) != len(s['mparams']):
@@ -136,6 +138,9 @@
                                 %endif
                                 %endfor
                                 ),
+                                %else:
+                                "",
+                                %endif
                                 make_handler(\
                                 ${indent(genHandler(sig=s), 9)}\
                                 )