🐛 add aggregate javadocs plugin

Author: blakesteve

build.gradle

@@ -1,7 +1,16 @@
+buildscript {
+  repositories { jcenter() }
+
+  dependencies {
+    classpath 'com.netflix.nebula:gradle-aggregate-javadocs-plugin:2.2.+'
+  }
+}
+
 plugins {
   id 'net.researchgate.release' version '2.4.0'
 }
 
+apply plugin: 'nebula-aggregate-javadocs'
 apply from: 'utils.gradle'
 apply plugin: 'java'
 apply plugin: 'checkstyle'
@@ -15,6 +24,11 @@ description = 'Client library to use the IBM Watson and Alchemy Services'
 
 task docs(type: Javadoc) {
   destinationDir = file("$buildDir/docs/all")
+  exclude {
+//    subprojects.each {
+//      '**/src/test/**'
+//    }
+  }
 }
 
 task copyJars(type: Copy) {
@@ -41,6 +55,10 @@ allprojects {
 
 subprojects {
 
+    rootProject.tasks.docs {
+      exclude 'alchemy/src/test/**'
+    }
+
   checkstyleTest {
     ignoreFailures = true
   }