Add working HttpSnoop example

Author: chrisvest

Dockerfile

@@ -24,7 +24,7 @@ ENV PATH=/home/build/apache-maven-3.6.3/bin:$PATH
 # Prepare a snapshot of Netty 5
 RUN git clone -b master https://github.com/netty/netty.git netty
 WORKDIR /home/build/netty
-RUN mvn install -DskipTests -T1C -B -am -pl buffer,handler
+RUN mvn install -DskipTests -T1C -B -am
 WORKDIR /home/build
 
 # Prepare our own build

pom.xml

@@ -400,6 +400,12 @@
       <version>${netty.version}</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>io.netty</groupId>
+      <artifactId>netty-codec-http</artifactId>
+      <version>${netty.version}</version>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.openjdk.jmh</groupId>
       <artifactId>jmh-core</artifactId>