reject newcontainer and process when sandbox is closed

[bergwolf]

Fixes panic:

panic(0x11a1ce0, 0xc4218baa70)
        /usr/local/go/src/runtime/panic.go:458 +0x243
github.com/hyperhq/hyperd/vendor/github.com/hyperhq/runv/hyperstart/libhyperstart.(*serialBasedHyperstart).setupProcessIo(0xc421024af0, 0xc42118f6c0, 0xc420655100)
        /home/jenkins/workspace/gopath/src/github.com/hyperhq/hyperd/vendor/github.com/hyperhq/runv/hyperstart/libhyperstart/serial.go:602 +0x19c
github.com/hyperhq/hyperd/vendor/github.com/hyperhq/runv/hyperstart/libhyperstart.(*serialBasedHyperstart).AddProcess(0xc421024af0, 0xc4212a8340, 0x40, 0xc4215cec00, 0x3, 0xc4200add80, 0x2, 0x4, 0xc420648000, 0x7f0dfae2e000, ...)
        /home/jenkins/workspace/gopath/src/github.com/hyperhq/hyperd/vendor/github.com/hyperhq/runv/hyperstart/libhyperstart/serial.go:655 +0x250
github.com/hyperhq/hyperd/vendor/github.com/hyperhq/runv/hypervisor.(*Vm).AddProcess(0xc4206bfb00, 0xc4212a8340, 0x40, 0xc4218ba830, 0xf, 0xc42118f600, 0xc42118f500, 0x2, 0x4, 0xc42118f640, ...)

[laijs]

I prefer

diff --git a/hyperstart/libhyperstart/serial.go b/hyperstart/libhyperstart/serial.go
index aa0c6cd..d521d6b 100644
--- a/hyperstart/libhyperstart/serial.go
+++ b/hyperstart/libhyperstart/serial.go
@@ -66,11 +66,11 @@ func (h *serialBasedHyperstart) Close() {
                for pk := range h.procs {
                        h.processAsyncEvents <- hyperstartapi.ProcessAsyncEvent{Container: pk.c, Process: pk.p, Event: "finished", Status: 255}
                }
-               h.procs = nil
+               h.procs = make(map[pKey]*pState)
                for _, out := range h.streamOuts {
                        out.Close()
                }
-               h.streamOuts = nil
+               h.streamOuts = make(map[uint64]streamOut)
                close(h.ctlChan)
                close(h.streamChan)
                close(h.processAsyncEvents)

[bergwolf]

@laijs updated.