Moves to official vendoring solution

vendor/github.com/onsi/gomega/matchers/have_key_matcher.go

@@ -0,0 +1,53 @@
+package matchers
+
+import (
+	"fmt"
+	"github.com/onsi/gomega/format"
+	"reflect"
+)
+
+type HaveKeyMatcher struct {
+	Key interface{}
+}
+
+func (matcher *HaveKeyMatcher) Match(actual interface{}) (success bool, err error) {
+	if !isMap(actual) {
+		return false, fmt.Errorf("HaveKey matcher expects a map.  Got:%s", format.Object(actual, 1))
+	}
+
+	keyMatcher, keyIsMatcher := matcher.Key.(omegaMatcher)
+	if !keyIsMatcher {
+		keyMatcher = &EqualMatcher{Expected: matcher.Key}
+	}
+
+	keys := reflect.ValueOf(actual).MapKeys()
+	for i := 0; i < len(keys); i++ {
+		success, err := keyMatcher.Match(keys[i].Interface())
+		if err != nil {
+			return false, fmt.Errorf("HaveKey's key matcher failed with:\n%s%s", format.Indent, err.Error())
+		}
+		if success {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}
+
+func (matcher *HaveKeyMatcher) FailureMessage(actual interface{}) (message string) {
+	switch matcher.Key.(type) {
+	case omegaMatcher:
+		return format.Message(actual, "to have key matching", matcher.Key)
+	default:
+		return format.Message(actual, "to have key", matcher.Key)
+	}
+}
+
+func (matcher *HaveKeyMatcher) NegatedFailureMessage(actual interface{}) (message string) {
+	switch matcher.Key.(type) {
+	case omegaMatcher:
+		return format.Message(actual, "not to have key matching", matcher.Key)
+	default:
+		return format.Message(actual, "not to have key", matcher.Key)
+	}
+}