Fix java8 template to support resources

With this change all resources within function's
`src/main/resources` will be added to function.jar. Before that
they used to be omited. The distribution, created after `gradle
build` was modifying the jars, excluding all resources. Fixed
that by deleting this distribution and creating a controlled one
with `gradle distZip`

Signed-off-by: Ivana Yovcheva (VMware) <iyovcheva@vmware.com>

template/java8/Dockerfile

@@ -20,7 +20,11 @@ WORKDIR /home/app
 
 COPY . /home/app/
 
-RUN gradle build
+# The distribution created by `gradle build` is modifying the jars, excluding all resources.
+# For that reason it is removed and created with `gradle distZip`
+RUN gradle build \
+    && rm /home/app/entrypoint/build/distributions/entrypoint* \
+    && gradle distZip
 
 FROM openjdk:8u121-jdk-alpine as ship
 RUN apk --no-cache add curl \

template/java8/entrypoint/build.gradle

@@ -13,6 +13,9 @@ plugins {
     // Apply the application plugin to add support for building an application
     id 'application'
 
+    // Apply the distribution plugin to add resources to entrypoint dist
+    id 'distribution'
+
 }
 
 // Define the main class for the application
@@ -29,6 +32,14 @@ dependencies {
     compile project(':function')
 }
 
+sourceSets {
+    main {
+        resources {
+            srcDirs "src/main/resources"
+        }
+    }
+}
+
 jar {
     manifest {
         attributes 'Implementation-Title': 'OpenFaaS Function',