ENYO-1957: cleanup hermes/node_modules

* ENYO-1957: add missing piece `node_modules/.bin/shelljs` (HEAD, enyojs/ENYO-1957, ENYO-1957)
* ENYO-957: remove submodule `node-XMLHttpRequest`

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>