Merge in go-hclog

vendor/github.com/hashicorp/go-hclog/nulllogger.go

@@ -0,0 +1,45 @@
+package hclog
+
+import (
+	"log"
+	"io/ioutil"
+)
+
+// NewNullLogger instantiates a Logger for which all calls
+// will succeed without doing anything.
+// Useful for testing purposes.
+func NewNullLogger() Logger {
+	return &nullLogger{}
+}
+
+type nullLogger struct{}
+
+func (l *nullLogger) Trace(msg string, args ...interface{}) {}
+
+func (l *nullLogger) Debug(msg string, args ...interface{}) {}
+
+func (l *nullLogger) Info(msg string, args ...interface{}) {}
+
+func (l *nullLogger) Warn(msg string, args ...interface{}) {}
+
+func (l *nullLogger) Error(msg string, args ...interface{}) {}
+
+func (l *nullLogger) IsTrace() bool { return false }
+
+func (l *nullLogger) IsDebug() bool { return false }
+
+func (l *nullLogger) IsInfo() bool { return false }
+
+func (l *nullLogger) IsWarn() bool { return false }
+
+func (l *nullLogger) IsError() bool { return false }
+
+func (l *nullLogger) With(args ...interface{}) Logger { return l }
+
+func (l *nullLogger) Named(name string) Logger { return l }
+
+func (l *nullLogger) ResetNamed(name string) Logger { return l }
+
+func (l *nullLogger) StandardLogger(opts *StandardLoggerOptions) *log.Logger {
+	return log.New(ioutil.Discard, "", log.LstdFlags)
+}

vendor/vendor.json

@@ -1087,10 +1087,10 @@
 			"revisionTime": "2018-02-23T19:15:17Z"
 		},
 		{
-			"checksumSHA1": "OEBNuHhYGJwXWNyZ2i+sAiOLtDs=",
+			"checksumSHA1": "qhjAx0nMYBeQqRTaf7sQYpfUIq0=",
 			"path": "github.com/hashicorp/go-hclog",
-			"revision": "ad26ae78d4726a0d9fd16afcdff629babc1fc661",
-			"revisionTime": "2018-04-02T19:56:19Z"
+			"revision": "69ff559dc25f3b435631604f573a5fa1efdb6433",
+			"revisionTime": "2018-04-02T20:04:05Z"
 		},
 		{
 			"checksumSHA1": "y+AeKVZoX0gB+DZW4Arzkb3tTVc=",