style(ngLocale): change es-us lcoale currency format

Fixed the angular-locale_es-us currency. Before `$1.234,56` After `$1,234.56`
http://publib.boulder.ibm.com/infocenter/forms/v3r5m0/index.jsp?topic=/com.ibm.form.designer.locales.doc/i_xfdl_r_formats_es_US.html

closes #8931