message_generation: netty as api dependency

Author: LeroyR

message_generation/build.gradle

@@ -26,9 +26,13 @@ compile 'org.apache.directory.studio:org.apache.commons.io:2.4'
 compile 'org.apache.directory.studio:org.apache.commons.lang:2.6'
 */
 
+plugins {
+    id 'java-library'
+}
+
 //noinspection GroovyAssignabilityCheck
 dependencies {
-  implementation 'io.netty:netty:3.5.2.Final'
+  api 'io.netty:netty:3.5.2.Final'
   implementation 'com.google.guava:guava:12.0'
   implementation 'org.apache.commons:com.springsource.org.apache.commons.codec:1.3.0'
   implementation 'org.apache.commons:com.springsource.org.apache.commons.io:1.4.0'