Fixes for reclass diff and README:

Change-Id: Id7b8aa425cd7e4317ba8f2e1e640bb515392c7d1
Related-PROD: PROD-28199
diff --git a/cfg_checker/reports/reporter.py b/cfg_checker/reports/reporter.py
index 377c061..ec120f3 100644
--- a/cfg_checker/reports/reporter.py
+++ b/cfg_checker/reports/reporter.py
@@ -159,8 +159,8 @@
 
     def _extend_data(self, data):
         # move names into separate place
-        data["names"] = data["rc_diffs"].pop("diff_names")
-        data["tabs"] = data.pop("rc_diffs")
+        data["names"] = data["diffs"].pop("diff_names")
+        data["tabs"] = data.pop("diffs")
         
         # counters - mdl_diff
         for _tab in data["tabs"].keys():