[DISCUSS]Drop bigtop-bigpetstore

[Masatake Iwasaki]

Hi developers,

I filed BIGTOP-4057[1] to drop bigtop-bigpetstore which is no longer 
maintained.

Please shout if someone is using this and willing to update the code.


[1]https://issues.apache.org/jira/browse/BIGTOP-4057


Thanks,

Masatake Iwasaki