Send week of installation and ref parameter to updater

[aekeus]

Test plan

See #12135

Description

We need to send the date of the previous Monday of an installation, and a promotion ref identifier to the updater.

[bsclifton]

Fixed with #12135

[srirambv]

Fails on Windows when running test plan

Sriram BV@DESKTOP-97HVIA8 MINGW64 /e/srirambv/master/browser-laptop (0.19.x+C63|MERGING)
$ REF=promo1 CHANNEL=dev npm run build-package
npm ERR! file E:\srirambv\master\browser-laptop\package.json
npm ERR! code EJSONPARSE
npm ERR! Failed to parse json
npm ERR! Unexpected token '<' at 3:1
npm ERR! <<<<<<< HEAD
npm ERR! ^
npm ERR! File: E:\srirambv\master\browser-laptop\package.json
npm ERR! Failed to parse package.json data.
npm ERR! package.json must be actual JSON, not just JavaScript.
npm ERR!
npm ERR! This is not a bug in npm.
npm ERR! Tell the package author to fix their package.json file. JSON.parse

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Sriram BV\AppData\Roaming\npm-cache\_logs\2017-12-11T09_29_49_224Z-debug.log

[bsclifton]

Re-fixed with #12247

[srirambv]

Seeing this on Updatelog and session-store-1 file. for a clean install

[srirambv]

Works on Linux too

[LaurenWags]

MacOS using packaged build 0.19.115: