attestation: Drop root, change to `attestation` user/group

BUG=chromium:348650
TEST=Create attestation user, and attestation group.
TEST=Make sure ps shows attestationd is running as attestation user.
TEST=Kill attestationd, make sure upstart will restart it.
TEST=Remove attestation user or group.
TEST=Make sure upstart fail to launch attestationd.

Change-Id: I4dde29845b9928ca8d135c6e48dd1f179497f4d3
Reviewed-on: https://chromium-review.googlesource.com/191727
Reviewed-by: Jorge Lucangeli Obes <[email protected]>
Tested-by: Nam Nguyen <[email protected]>
Commit-Queue: Nam Nguyen <[email protected]>
2 files changed
tree: 25ff4bf4089364d46e12ec788ccd37ab60cf6ed7
  1. client/
  2. common/
  3. server/
  4. attestation.gyp