tree 17423a64ecf01e794db677e57b6320599715d906
parent 34668e731bb194b443bc0e6029d6d3583f08de28
author Vitaly Buka <vitalybuka@google.com> 1449788197 -0800
committer Vitaly Buka <vitalybuka@google.com> 1450229999 +0000

Return Root Client Authorization Token using /privet/v3/accessControl/*

RCAT is returned in /privet/v3/accessControl/claim results.
Then client needs to store token and call
/privet/v3/accessControl/confirm with original or derived token.
Depending on result of confirm call client may:
1. No error - Start using token
2. Request error - retry confirm step
3. Unknown token - claim access again
4. Already claimed error - to late, someone else claimed device

BUG=25766815, 26143922

Change-Id: I9d25004e84210142214e6eb0a23d8e3ae7b57d6a
Reviewed-on: https://weave-review.googlesource.com/1885
Reviewed-by: Vitaly Buka <vitalybuka@google.com>