Tools: param_metadata: check for duplicate enteries in parameter value field

Tools/autotest/param_metadata/param_parse.py

@@ -296,6 +296,15 @@ def validate(param):
         if not is_number(max_value):
             error("Max value not number: %s %s" % (param.name, max_value))
             return
+    # Check for duplicate in @value field 
+    if (hasattr(param, "Values")):
+        valueList = param.__dict__["Values"].split(",")
+        values = []
+        for i in valueList:
+            i = i.replace(" ","")
+            values.append(i.partition(":")[0])
+        if (len(values) != len(set(values))):
+            error("Duplicate values found")
     # Validate units
     if (hasattr(param, "Units")):
         if (param.__dict__["Units"] != "") and (param.__dict__["Units"] not in known_units):