[infer] change filter semantics to included or not excluded

Summary: As per title.

Reviewed By: ezgicicek

Differential Revision: D26340077

fbshipit-source-id: 3fffc9db9

infer/src/IR/inferconfig.ml

@@ -331,8 +331,7 @@ let load_filters () =
 let filters_from_inferconfig inferconfig : filters =
   let path_filter =
     let whitelist_filter : path_filter =
-      if List.is_empty inferconfig.whitelist then default_path_filter
-      else is_matching (List.map ~f:Str.regexp inferconfig.whitelist)
+      is_matching (List.map ~f:Str.regexp inferconfig.whitelist)
     in
     let blacklist_filter : path_filter =
       is_matching (List.map ~f:Str.regexp inferconfig.blacklist)
@@ -346,7 +345,7 @@ let filters_from_inferconfig inferconfig : filters =
     function
     | source_file ->
         whitelist_filter source_file
-        && (not (blacklist_filter source_file))
+        || (not (blacklist_filter source_file))
            && not (blacklist_files_containing_filter source_file)
   in
   let error_filter = function