Make sudo check in ip_lib.IpNetnsCommand.execute optional

If the process runs as root the root_helper and sudo check
are not required.

Closes-Bug: #1393184
Change-Id: I7876ca7e4652f8152d1a8a0015cc897b09b31899
Enforce log hints in ofagent and oneconvergence

This change enforces log hints use and removes debug level log
translation, modifications are validated through a hacking rule
and the change respects loggging guidelines. Validate that hacking
rules apply to directories:-
    neutron/plugins/ofagent
    neutron/plugins/oneconvergence

Change-Id: I520a36ae53848b828ce33f4050606a7238f4cbce
Partial-bug: #1320867
Merge "Make sudo check in ip_lib.IpNetnsCommand.execute optional"
Merge "Enforce log hints in ofagent and oneconvergence"
Merge branch 'master' of https://github.com/openstack/quantum