AAAA Records should work as A records

Traceback for an AAAA record :
```
  File "/usr/lib64/python2.7/site-packages/route53/hosted_zone.py", line 84, in record_sets
    for rrset in self.connection._list_resource_record_sets_by_zone_id(self.id):
  File "/usr/lib64/python2.7/site-packages/route53/connection.py", line 90, in _do_autopaginating_api_call
    for record in parser_func(root, connection=self, **parser_kwargs):
  File "/usr/lib64/python2.7/site-packages/route53/xml_parsers/list_resource_record_sets_by_zone_id.py", line 140, in list_resource_record_sets_by_zone_id_parser
    yield parse_rrset(e_rrset, connection, zone_id)
  File "/usr/lib64/python2.7/site-packages/route53/xml_parsers/list_resource_record_sets_by_zone_id.py", line 117, in parse_rrset
    return RRSetSubclass(**kwargs)
TypeError: __init__() got an unexpected keyword argument 'alias_hosted_zone_id'
```