autotest: stop emitting duplicate rangefinder headings

This was only an issue for the Wasp rangefinder block, which drops stuff
in at the top level by specifying the same subgroup name as the top
level.

Tools/autotest/param_metadata/param_parse.py

@@ -231,21 +231,34 @@ def process_library(vehicle, library, pathprefix=None):
         group_matches = prog_groups.findall(p_text)
         debug("Found %u groups" % len(group_matches))
         debug(group_matches)
+        done_groups = dict()
         for group_match in group_matches:
             group = group_match[0]
             debug("Group: %s" % group)
-            lib = Library(group)
+            do_append = True
+            if group in done_groups:
+                # this is to handle cases like the RangeFinder
+                # parameters, where the wasp stuff gets tack into the
+                # same RNGFND1_ group
+                lib = done_groups[group]
+                do_append = False
+            else:
+                lib = Library(group)
+                done_groups[group] = lib
+
             fields = prog_param_fields.findall(group_match[1])
             for field in fields:
                 if field[0] in known_group_fields:
                     setattr(lib, field[0], field[1])
                 else:
                     error("unknown parameter metadata field '%s'" % field[0])
             if not any(lib.name == parsed_l.name for parsed_l in libraries):
-                lib.name = library.name + lib.name
+                if do_append:
+                    lib.name = library.name + lib.name
                 debug("Group name: %s" % lib.name)
                 process_library(vehicle, lib, os.path.dirname(libraryfname))
-                alllibs.append(lib)
+                if do_append:
+                    alllibs.append(lib)
 
     current_file = None