Delete restic repository from backend if Repository CRD is deleted (#438)

This PR fixes #416 

Task List:
- [x] Implement restic repo deletion while Repository CRD delete
- [x] Add test
- [x] Update doc

Author: Md. Emruz Hossain

server/start.go

@@ -67,6 +67,7 @@ func (o StashOptions) Config() (*server.StashConfig, error) {
 		"/swaggerapi",
 		"/apis/admission.stash.appscode.com/v1alpha1/restics",
 		"/apis/admission.stash.appscode.com/v1alpha1/recoveries",
+		"/apis/admission.stash.appscode.com/v1alpha1/repositories",
 		"/apis/admission.stash.appscode.com/v1alpha1/deployments",
 		"/apis/admission.stash.appscode.com/v1alpha1/daemonsets",
 		"/apis/admission.stash.appscode.com/v1alpha1/statefulsets",

snapshot.go

@@ -45,6 +45,9 @@ func NewCmdSnapshots() *cobra.Command {
 				return err
 			}
 			jsonSnaps, err := json.MarshalIndent(snapshots, "", "    ")
+			if err != nil {
+				return err
+			}
 			fmt.Println(string(jsonSnaps))
 			return nil
 		},