Revendor github.com/Microsoft/hcsshim

1. Revendors github.com/Microsoft/hcsshim to the latest known good commit.
This includes numerous bug fixes and improvements.

2. Vendors indirect dependency on go.opencensus.io since hcsshim now uses trace
correlation.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>

vendor/github.com/Microsoft/hcsshim/internal/oc/exporter.go

@@ -0,0 +1,43 @@
+package oc
+
+import (
+	"github.com/sirupsen/logrus"
+	"go.opencensus.io/trace"
+)
+
+var _ = (trace.Exporter)(&LogrusExporter{})
+
+// LogrusExporter is an OpenCensus `trace.Exporter` that exports
+// `trace.SpanData` to logrus output.
+type LogrusExporter struct {
+}
+
+// ExportSpan exports `s` based on the the following rules:
+//
+// 1. All output will contain `s.Attributes`, `s.TraceID`, `s.SpanID`,
+// `s.ParentSpanID` for correlation
+//
+// 2. Any calls to .Annotate will not be supported.
+//
+// 3. The span itself will be written at `logrus.InfoLevel` unless
+// `s.Status.Code != 0` in which case it will be written at `logrus.ErrorLevel`
+// providing `s.Status.Message` as the error value.
+func (le *LogrusExporter) ExportSpan(s *trace.SpanData) {
+	// Combine all span annotations with traceID, spanID, parentSpanID
+	baseEntry := logrus.WithFields(logrus.Fields(s.Attributes))
+	baseEntry.Data["traceID"] = s.TraceID.String()
+	baseEntry.Data["spanID"] = s.SpanID.String()
+	baseEntry.Data["parentSpanID"] = s.ParentSpanID.String()
+	baseEntry.Data["startTime"] = s.StartTime
+	baseEntry.Data["endTime"] = s.EndTime
+	baseEntry.Data["duration"] = s.EndTime.Sub(s.StartTime).String()
+	baseEntry.Data["name"] = s.Name
+	baseEntry.Time = s.StartTime
+
+	level := logrus.InfoLevel
+	if s.Status.Code != 0 {
+		level = logrus.ErrorLevel
+		baseEntry.Data[logrus.ErrorKey] = s.Status.Message
+	}
+	baseEntry.Log(level, "Span")
+}

vendor/github.com/Microsoft/hcsshim/internal/oc/span.go

@@ -0,0 +1,17 @@
+package oc
+
+import (
+	"go.opencensus.io/trace"
+)
+
+// SetSpanStatus sets `span.SetStatus` to the proper status depending on `err`. If
+// `err` is `nil` assumes `trace.StatusCodeOk`.
+func SetSpanStatus(span *trace.Span, err error) {
+	status := trace.Status{}
+	if err != nil {
+		// TODO: JTERRY75 - Handle errors in a non-generic way
+		status.Code = trace.StatusCodeUnknown
+		status.Message = err.Error()
+	}
+	span.SetStatus(status)
+}