update rspec syntax to v3
change syntax to rspec v3
oops. fix typo
mailers classes with rspec3 syntax
helpers with rspec3 syntax
jobs with rspec3 syntax
serializers with rspec3 syntax
views with rspec3 syntax
support to rspec3 syntax
category spec with rspec3 syntax
Due to what seems to be a bug in ActiveRecord, the distinct: true option
is not recognized on counts with string column names. This commit fixes
that by moving the DISTINCT into the count string.
For robustness, the integration spec for IncomingLinksReport was
rewritten to be an actual integration spec, running the actual interface
on actual fake data.
