Fix a typo in doc w.r.t. Ubuntu version.

Change-Id: Icf536b8bdc4de76e7e887ec6d945d800018a6798
Fix PEP8.

Change-Id: Ide673489e2351d0a810b7d94500daedfbf7abf70
Check if user is authenticated before hiding tests.

Change-Id: I3368dff718eeeea440c5d04140c758ae08714ed5
Multinode: forward is_slave only if already defined

Change-Id: I84b9a0fd80e018e5e0a7ea9f85ea2e517598156a
Merge branch 'master' into staging