MAGETWO-45554: URLs in emails have sid parameter

 - Added _nosid to email templates for user confirmation

Author: aohorodnyk

app/code/Magento/Customer/view/frontend/email/account_new_confirmation.html

@@ -23,7 +23,7 @@
             <table class="inner-wrapper" border="0" cellspacing="0" cellpadding="0" align="center">
                 <tr>
                     <td align="center">
-                        <a href="{{var this.getUrl($store,'customer/account/confirm/',[_query:[id:$customer.id,key:$customer.confirmation,back_url:$back_url]])}}" target="_blank">{{trans "Confirm Your Account"}}</a>
+                        <a href="{{var this.getUrl($store,'customer/account/confirm/',[_query:[id:$customer.id,key:$customer.confirmation,back_url:$back_url],_nosid:1])}}" target="_blank">{{trans "Confirm Your Account"}}</a>
                     </td>
                 </tr>
             </table>