classifer: Fix test classifier to match real classifier.
The trivial test classifier had the same bug as the real classifier
when replacing matching flows. This caused it to not find the
original bug and then break when the bug was fixed.
classifier: Check all rules of equal priority when inserting.
When adding a new classifier rule we check if there is a rule
of the same priority first and overwrite it before inserting a
new rule. Previously we would stop looking if we found one rule
in the correct bucket with the same priority, even if it didn't
match. This keeps going until we either find a matching rule or
we run out of equal priority rules.
