Update libcni to add metadata to interface

Author: MikeZappa87

pkg/types/100/types.go

@@ -245,9 +245,10 @@ func (r *Result) PrintTo(writer io.Writer) error {
 
 // Interface contains values about the created interfaces
 type Interface struct {
-	Name    string `json:"name"`
-	Mac     string `json:"mac,omitempty"`
-	Sandbox string `json:"sandbox,omitempty"`
+	Name     string `json:"name"`
+	Mac      string `json:"mac,omitempty"`
+	Sandbox  string `json:"sandbox,omitempty"`
+	Metadata map[string]string `json:"metadata,omitempty"`
 }
 
 func (i *Interface) String() string {

pkg/types/100/types_test.go

@@ -54,6 +54,7 @@ func testResult() *current.Result {
 				Name:    "eth0",
 				Mac:     "00:11:22:33:44:55",
 				Sandbox: "/proc/3553/ns/net",
+				Metadata: make(map[string]string),
 			},
 		},
 		IPs: []*current.IPConfig{

pkg/types/types_test.go

@@ -162,6 +162,7 @@ var _ = Describe("Types", func() {
 						Name:    "eth0",
 						Mac:     "00:11:22:33:44:55",
 						Sandbox: "/proc/3553/ns/net",
+						Metadata: make(map[string]string),
 					},
 				},
 				IPs: []*current.IPConfig{