Update jenkinsfile and gradle for new versions of things..

Signed-off-by: cpw <cpw+github@weeksfamily.ca>

Jenkinsfile

@@ -6,8 +6,8 @@ pipeline {
     }
     agent {
         docker {
-            image 'gradlewrapper:latest'
-            args '-v gradlecache:/gradlecache'
+            image 'gradle:jdk8'
+            args '-v forgegc:/home/gradle/.gradle/'
         }
     }
     environment {
@@ -18,13 +18,6 @@ pipeline {
     }
 
     stages {
-        /* This resets the checkout on jenkins, but doesn't take branch into account... 
-        stage('fetch') {
-            steps {
-                checkout scm
-            }
-        }
-        */
         stage('notify_start') {
             when {
                 not {
@@ -93,9 +86,7 @@ pipeline {
         always {
             script {
                 archiveArtifacts artifacts: 'projects/forge/build/libs/**/*.*', fingerprint: true, onlyIfSuccessful: true, allowEmptyArchive: true
-                //junit 'build/test-results/*/*.xml'
-                //jacoco sourcePattern: '**/src/*/java'
-                
+
                 if (env.CHANGE_ID == null) { // This is unset for non-PRs
                     discordSend(
                         title: "${DISCORD_PREFIX} Finished ${currentBuild.currentResult}",

build.gradle

@@ -431,11 +431,11 @@ project(':forge') {
         installer 'org.ow2.asm:asm:7.2'
         installer 'org.ow2.asm:asm-commons:7.2'
         installer 'org.ow2.asm:asm-tree:7.2'
-        installer 'cpw.mods:modlauncher:5.0.+'
-        installer 'cpw.mods:grossjava9hacks:1.1.+'
-        installer 'net.minecraftforge:accesstransformers:2.0.+:shadowed'
-        installer 'net.minecraftforge:eventbus:2.0.+:service'
-        installer 'net.minecraftforge:forgespi:2.0.+'
+        installer 'cpw.mods:modlauncher:5.1.+'
+        installer 'cpw.mods:grossjava9hacks:1.3.+'
+        installer 'net.minecraftforge:accesstransformers:2.1.+:shadowed'
+        installer 'net.minecraftforge:eventbus:2.1.+:service'
+        installer 'net.minecraftforge:forgespi:2.1.+'
         installer 'net.minecraftforge:coremods:2.0.+'
         installer 'net.minecraftforge:unsafe:0.2.+'
         installer 'com.electronwill.night-config:core:3.6.2'