Add a flag or configuration value to test based on rule attributes

[fzipi]

Don't know if this is feasible, but let's see. We found out that we might want to skip (or don't run tests) based on attributes of the rule we are testing.

An example is that we don't run tests that match rules that have paranoia level bigger than PL1.

There is no simple solution now, as we are not parsing rules files now. Once we have a parser it might be easy to implement.