Create filename based filters from xml config
Add filter examples into sample wolf config
Fix the dependency exceptions squashing in surefire reporter + add test cases

 * the reporter was broken due to the recent changes in how the dependency
   exceptions are reported. Now all exceptions pointing to same missing
   artifact are squashed into single test failure.
 * the DependencyNotFoundException now creates default DependencyNode under
   the good (from the validated artifact) if none specified. The reporting
   and generally handling the exception is now much easier.
Clean-up the exception filters loading

 * all the filters are registered as beans, so there
   is no need for the additional method gather* method
Log ignored exceptions and details about the exception filters being applied