[acl-loader] Use V6 ethertype for IPv6 ACL rule (sonic-net#788)

If ACL table name contains the substring "v6", set the EtherType of the rule to V6, otherwise set to V4.

Author: jleveque

acl_loader/main.py

@@ -474,8 +474,11 @@ def deny_rule(self, table_name):
         rule_props = {}
         rule_data = {(table_name, "DEFAULT_RULE"): rule_props}
         rule_props["PRIORITY"] = str(self.min_priority)
-        rule_props["ETHER_TYPE"] = str(self.ethertype_map["ETHERTYPE_IPV4"])
         rule_props["PACKET_ACTION"] = "DROP"
+        if 'v6' in table_name.lower():
+            rule_props["ETHER_TYPE"] = str(self.ethertype_map["ETHERTYPE_IPV6"])
+        else:
+            rule_props["ETHER_TYPE"] = str(self.ethertype_map["ETHERTYPE_IPV4"])
         return rule_data
 
     def convert_rules(self):