Added ignorenotfound flag for all resources' deletion (#2293)

Treat \"resource not found\" as a successful delete if ignorenotfound flag passed while deletion of Fission resource.

pkg/fission-cli/cmd/function/delete.go

@@ -25,6 +25,7 @@ import (
 	"github.com/fission/fission/pkg/fission-cli/cliwrapper/cli"
 	"github.com/fission/fission/pkg/fission-cli/cmd"
 	flagkey "github.com/fission/fission/pkg/fission-cli/flag/key"
+	"github.com/fission/fission/pkg/fission-cli/util"
 )
 
 type DeleteSubCommand struct {
@@ -43,6 +44,9 @@ func (opts *DeleteSubCommand) do(input cli.Input) error {
 
 	err := opts.Client().V1().Function().Delete(m)
 	if err != nil {
+		if input.Bool(flagkey.IgnoreNotFound) && util.IsNotFound(err) {
+			return nil
+		}
 		return errors.Wrap(err, fmt.Sprintf("delete function '%v'", m.Name))
 	}