Bumping netty dependency versions to 4.1.5.Final.

Including test fixes.

Few more places referencing atomix version

Change-Id: I48fb8fa255624a86ae12117845603f7d53f1c29e
diff --git a/core/store/dist/BUCK b/core/store/dist/BUCK
index b5db3b8..0e4731e 100644
--- a/core/store/dist/BUCK
+++ b/core/store/dist/BUCK
@@ -8,6 +8,7 @@
     '//lib:netty-buffer',
     '//lib:netty-handler',
     '//lib:netty-transport-native-epoll',
+    '//lib:netty-resolver',
     '//lib:commons-math3',
     '//incubator/api:onos-incubator-api',
 ]