vendor: update all dependencies except Azure SDK

The Azure SDK doesn't support Go 1.5 anymore. We can't upgrade it until
Go 1.8 comes out.

vendor/github.com/rcrowley/go-metrics/gauge.go

@@ -44,7 +44,6 @@ func NewFunctionalGauge(f func() int64) Gauge {
 	return &FunctionalGauge{value: f}
 }
 
-
 // NewRegisteredFunctionalGauge constructs and registers a new StandardGauge.
 func NewRegisteredFunctionalGauge(name string, r Registry, f func() int64) Gauge {
 	c := NewFunctionalGauge(f)
@@ -101,6 +100,7 @@ func (g *StandardGauge) Update(v int64) {
 func (g *StandardGauge) Value() int64 {
 	return atomic.LoadInt64(&g.value)
 }
+
 // FunctionalGauge returns value from given function
 type FunctionalGauge struct {
 	value func() int64
@@ -117,4 +117,4 @@ func (g FunctionalGauge) Snapshot() Gauge { return GaugeSnapshot(g.Value()) }
 // Update panics.
 func (FunctionalGauge) Update(int64) {
 	panic("Update called on a FunctionalGauge")
-}
+}

vendor/github.com/rcrowley/go-metrics/registry.go

@@ -167,9 +167,9 @@ func NewPrefixedChildRegistry(parent Registry, prefix string) Registry {
 
 // Call the given function for each registered metric.
 func (r *PrefixedRegistry) Each(fn func(string, interface{})) {
-	wrappedFn := func (prefix string) func(string, interface{}) {
+	wrappedFn := func(prefix string) func(string, interface{}) {
 		return func(name string, iface interface{}) {
-			if strings.HasPrefix(name,prefix) {
+			if strings.HasPrefix(name, prefix) {
 				fn(name, iface)
 			} else {
 				return
@@ -184,7 +184,7 @@ func (r *PrefixedRegistry) Each(fn func(string, interface{})) {
 func findPrefix(registry Registry, prefix string) (Registry, string) {
 	switch r := registry.(type) {
 	case *PrefixedRegistry:
-		return findPrefix(r.underlying, r.prefix + prefix)
+		return findPrefix(r.underlying, r.prefix+prefix)
 	case *StandardRegistry:
 		return r, prefix
 	}

vendor/github.com/rcrowley/go-metrics/sample.go

@@ -33,7 +33,7 @@ type Sample interface {
 // priority reservoir.  See Cormode et al's "Forward Decay: A Practical Time
 // Decay Model for Streaming Systems".
 //
-// <http://www.research.att.com/people/Cormode_Graham/library/publications/CormodeShkapenyukSrivastavaXu09.pdf>
+// <http://dimacs.rutgers.edu/~graham/pubs/papers/fwddecay.pdf>
 type ExpDecaySample struct {
 	alpha         float64
 	count         int64
@@ -302,6 +302,13 @@ type SampleSnapshot struct {
 	values []int64
 }
 
+func NewSampleSnapshot(count int64, values []int64) *SampleSnapshot {
+	return &SampleSnapshot{
+		count:  count,
+		values: values,
+	}
+}
+
 // Clear panics.
 func (*SampleSnapshot) Clear() {
 	panic("Clear called on a SampleSnapshot")