Bug 1988692: Fixing badgr API calls

This patch
- updates the API calls
- records the refresh token and the expiry time
- handle refreshing tokens as a cron job

Change-Id: I4c2eb50cda031a107e5f01cda3348a5a23da589b
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>
(cherry picked from commit fb7ea62d)