Restored --atomic flag on install command

Signed-off-by: Travis Leeden <travis.leeden@octopus.com>

pkg/cmd/install.go

@@ -201,6 +201,7 @@ func addInstallFlags(cmd *cobra.Command, f *pflag.FlagSet, client *action.Instal
 	f.BoolVar(&client.DependencyUpdate, "dependency-update", false, "update dependencies if they are missing before installing the chart")
 	f.BoolVar(&client.DisableOpenAPIValidation, "disable-openapi-validation", false, "if set, the installation process will not validate rendered templates against the Kubernetes OpenAPI Schema")
 	f.BoolVar(&client.RollbackOnFailure, "rollback-on-failure", false, "if set, Helm will rollback (uninstall) the installation upon failure. The --wait flag will be default to \"watcher\" if --rollback-on-failure is set")
+	f.BoolVar(&client.RollbackOnFailure, "atomic", false, "deprecated")
 	f.MarkDeprecated("atomic", "use --rollback-on-failure instead")
 	f.BoolVar(&client.SkipCRDs, "skip-crds", false, "if set, no CRDs will be installed. By default, CRDs are installed if not already present")
 	f.BoolVar(&client.SubNotes, "render-subchart-notes", false, "if set, render subchart notes along with the parent")