Fixed net errors, optimizations and sniffer WIP

Quick fix for package versions compare logic:
 - repo update is OK when candidate is the same
 - repo update is not ok when all versions different

Change-Id: I6602d5486b98375b254d0d92a6071fb26582b770
Related-PROD: PROD-28199
diff --git a/cfg_checker/common/const.py b/cfg_checker/common/const.py
index cbd0643..966f3d3 100644
--- a/cfg_checker/common/const.py
+++ b/cfg_checker/common/const.py
@@ -31,7 +31,7 @@
     ACT_UPGRADE: "upgrade possible",
     ACT_NEED_UP: "needs upgrade",
     ACT_NEED_DOWN: "needs downgrade",
-    ACT_REPO: "needs repo update",
+    ACT_REPO: "repo update",
     ACT_NA: ""
 }