Merge branch 'stable-2.8' into stable-2.9

* stable-2.8:
  Update 2.8.6 release notes with recent fixes
  Update SSHD to 0.11.1-atlassian-1
  Expose Atlassian's maven repository
  Update gwtorm to 1.7.1
  Buck: Strip SNAPSHOT suffix in artifact names only for GERRIT repositories

Conflicts:
	lib/BUCK
	tools/download_file.py

Change-Id: Ia315d2da7a884f8466b461234183d78ef833675f