validate openAPI schema should be in dry-run path

Signed-off-by: Nitin Malik <nitinmalik02015@gmail.com>

pkg/action/rollback.go

@@ -141,10 +141,6 @@ func (r *Rollback) prepareRollback(name string) (*release.Release, *release.Rele
 }
 
 func (r *Rollback) performRollback(currentRelease, targetRelease *release.Release) (*release.Release, error) {
-	if r.DryRun {
-		r.cfg.Log("dry run for %s", targetRelease.Name)
-		return targetRelease, nil
-	}
 
 	current, err := r.cfg.KubeClient.Build(bytes.NewBufferString(currentRelease.Manifest), true)
 	if err != nil {
@@ -156,6 +152,11 @@ func (r *Rollback) performRollback(currentRelease, targetRelease *release.Releas
 		return targetRelease, errors.Wrap(err, "unable to build kubernetes objects from new release manifest")
 	}
 
+	if r.DryRun {
+		r.cfg.Log("dry run for %s", targetRelease.Name)
+		return targetRelease, nil
+	}
+
 	// pre-rollback hooks
 	if !r.DisableHooks {
 		if err := r.cfg.execHook(targetRelease, release.HookPreRollback, r.Timeout); err != nil {