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/package/delete.go

@@ -26,6 +26,7 @@ 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 {
@@ -68,6 +69,9 @@ func (opts *DeleteSubCommand) run(input cli.Input) error {
 			Name:      opts.name,
 		})
 		if err != nil {
+			if input.Bool(flagkey.IgnoreNotFound) && util.IsNotFound(err) {
+				return nil
+			}
 			return errors.Wrap(err, "find package")
 		}