P2P: Session destroy failed

[anjmao]

Consumer disconnected but provider side failed to handle session destroy. Tested with CLI consumser (macos).

2020-03-31T10:06:33.703 DBG p2p/channel.go:101                       > Received P2P keep alive ping, peer public key: f48458e692b7221a224a9189a99c39eaafa0ef589f3cb9656c64ac5ea6b89420
2020-03-31T10:06:47.874 INF core/service/subscription.go:88          > Received P2P message for "p2p-session-destroy": consumerID:"0x5018e5d4dd0e1cf4f6de83dd0b4862ae8e6990c6" sessionID:"5569e7f8-b5a6-4f39-9a56-fb0249134b3e"
2020-03-31T10:06:47.875 ERR p2p/channel.go:182                       > Handler "p2p-session-destroy" internal error error="cannot destroy session 5569e7f8-b5a6-4f39-9a56-fb0249134b3e: session does not exists"
2020-03-31T10:07:15.438 DBG session/pingpong/price_calculator.go:66  > Calculated price 214201. Time component: 201191, data component: 13010 
2020-03-31T10:07:23.704 ERR p2p/channel.go:242                       > Failed to send P2P keepalive message error="send timeout"