Use SupprresionPatchFilter to test checks belong to TreeWalker and generate diff reports

[checkstyle]

Use SupprresionPatchFilter to test checks belong to TreeWalker and generate diff reports

[romani]

@HuGanghui , please update issue description and title ... I do not understand what is "current filter".
If you mean SupprresionPatchFilter, yes we need to test how it works on Checks from TreeWalker. User might not use SupprresionPatchXpathFilter. But realistically there will be both filters in use almost always so we need to know how they works in all combinations.
As I mentioned at #7 (comment), Checker filter might suppress all that passed from Treewalker filter, so we need to teach SupprresionPatchFilter how to pass all violations from certain Checks.

Please create UT cases where two filters are in use and how it will work on java related Check (that use AST).
we can create new package bothpatchfilters at https://github.com/checkstyle/patch-filters/tree/master/src/test/resources/com/puppycrawl/tools/checkstyle/filters. Please do,

it will be much better than diff report. Diff report is good then we know how it works on certain cases and we want to explore more real life usecases. We are not ready for exploration now as there are a lot of cases we can simply make ourself.

[HuGanghui]

The fixes were solved in #285.