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/pom.xml b/core/store/dist/pom.xml
index 8cff6ad..64ad934 100644
--- a/core/store/dist/pom.xml
+++ b/core/store/dist/pom.xml
@@ -100,20 +100,28 @@
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-transport</artifactId>
+            <version>${netty4.version}</version>
         </dependency>
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-codec</artifactId>
+            <version>${netty4.version}</version>
         </dependency>
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-handler</artifactId>
+            <version>${netty4.version}</version>
         </dependency>
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-transport-native-epoll</artifactId>
             <version>${netty4.version}</version>
         </dependency>
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-resolver</artifactId>
+            <version>${netty4.version}</version>
+        </dependency>
     </dependencies>
 
 </project>