Turn on devstack exercises for neutron (non-voting)

Currently devstack exercises are not working for havana neutron.
This makes it very difficult to write the required grenade job
for neutron.

This patch turns devstack exercises on for neutron in check,
jobs enabling devstack exercise failures to be tracked.
There is a provision to add this job to periodic jobs in the
future.

Change-Id: Id177bc58cdaf78dddece1ac1ac137cc03d32bd9c
Check for whitespace around changeid searches

If a URL contains a change ID such as
http://example.org/change/123abc456/log.html then the changeid regex
matches the id and tries to turn it into a link like:
http://example.org/change/<a href="#q,123abc456,n,z">123abc456</a>/log.html
which clearly breaks the original URL.

To fix we should check for whitespace or periods around the changeid
in the comment. Also, check for <p> tags that gerrit adds to comments
for us.

Change-Id: Ia337ddfe2ddc82c858072135a613786070f0dc67
Merge "Turn on devstack exercises for neutron (non-voting)"
Merge "Check for whitespace around changeid searches"