Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Test all-numeric username

Change-Id: Ie659c4e19b9258dcb5b4ada96305d47b591cd5b7
tree: 893a829239a199ce840d18ca7c00a6f6186cc45b
  1. .gitignore
  2. .settings/
  3. BUILD
  4. LICENSE
  5. src/