buffet: Start XMPP immediately after registration

TEST=manually and FEATURES=test emerge-${BOARD} buffet
BUG=brillo:287

Change-Id: I26f59e2b12a6ca5b49569efd7495e920e58aefe5
Reviewed-on: https://chromium-review.googlesource.com/251045
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Nathan Bullock <nathanbullock@google.com>
Commit-Queue: Nathan Bullock <nathanbullock@google.com>
Tested-by: Nathan Bullock <nathanbullock@google.com>
2 files changed
tree: 65335ecb56f0029ba900897150023ca8802054e8
  1. buffet/