Update accrording new flake8

Includes backport of fix for #1299287.

Closes-bug: #1311799
Change-Id: I49b9898eb6d3770c64fb458a6b63deecd8001a39
RabbitMQ 3 support

RabbitMQ 3 do not support such big TTL which we used before.
Big TTL was need to solve problem with node time dissynchronization.
Now we use NTP to resolve this issue. That is why this value
can be reduced.

Related-Bug: #1278336
Related-Bug: #1276770
Change-Id: I0a56b88247d9839bc3282294cdb8592ed2701c3a
US build tweaks. Do not merge.

Change-Id: If7f369078f5e1b559a2ec2aa9429f3759e037ba4