Add hvsock connection tests

Add tests for binding to and listening on hyper-v sockets from within a
uVM (as well as a hyper-v isolated containerd).
Tests verify default SDDL and wildcard bind settings, as well updating
the settings for a particular service ID.

Signed-off-by: Hamza El-Saawy <hamzaelsaawy@microsoft.com>

internal/uvm/create.go

@@ -10,6 +10,7 @@ import (
 	"path/filepath"
 	"runtime"
 
+	"github.com/Microsoft/go-winio/pkg/guid"
 	"github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 	"golang.org/x/sys/windows"
@@ -173,6 +174,13 @@ func (uvm *UtilityVM) ID() string {
 	return uvm.hcsSystem.ID()
 }
 
+// RuntimeID returns Hyper-V VM GUID.
+//
+// Only valid after the utility VM has been created.
+func (uvm *UtilityVM) RuntimeID() guid.GUID {
+	return uvm.runtimeID
+}
+
 // OS returns the operating system of the utility VM.
 func (uvm *UtilityVM) OS() string {
 	return uvm.operatingSystem