Added dependency on netty-all in Maven.

core/pom.xml

@@ -87,6 +87,10 @@
       <groupId>org.apache.mesos</groupId>
       <artifactId>mesos</artifactId>
     </dependency>
+    <dependency>
+      <groupId>io.netty</groupId>
+      <artifactId>netty-all</artifactId>
+    </dependency>
     <dependency>
       <groupId>log4j</groupId>
       <artifactId>log4j</artifactId>

pom.xml

@@ -256,6 +256,11 @@
         <artifactId>mesos</artifactId>
         <version>${mesos.version}</version>
       </dependency>
+      <dependency>
+        <groupId>io.netty</groupId>
+        <artifactId>netty-all</artifactId>
+        <version>4.0.0.Beta2</version>
+      </dependency>
       <dependency>
         <groupId>org.apache.derby</groupId>
         <artifactId>derby</artifactId>