Add missing netty-codec-haproxy dependency (#1731)

connector/pom.xml

@@ -152,6 +152,12 @@
             <version>4.1.43.Final</version>
             <scope>compile</scope>
         </dependency>
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-codec-haproxy</artifactId>
+            <version>4.1.56.Final</version>
+            <scope>compile</scope>
+        </dependency>
         <dependency>
             <groupId>org.reflections</groupId>
             <artifactId>reflections</artifactId>