[OWL-240] add Ipv4 and Port to type Endpoint struct{}
[OWL-240] add Ipv4 and Port to type Endpoint struct{}

masato25/open-falcon-backend,Cepave/open-falcon-backend,Cepave/open-falcon-backend,masato25/open-falcon-backend,masato25/open-falcon-backend,masato25/query,Cepave/open-falcon-backend,masato25/open-falcon-backend,masato25/open-falcon-backend,Cepave/query,Cepave/query,Cepave/open-falcon-backend,masato25/query,masato25/query,masato25/query,Cepave/open-falcon-backend,Cepave/query,masato25/open-falcon-backend,Cepave/open-falcon-backend,Cepave/query