Merge pull request #3513 from lissyx/fix-decision-task-r0.9

Fix decision task

.taskcluster.yml

@@ -32,7 +32,7 @@ tasks:
 
     payload:
       maxRunTime: 600
-      image: "ubuntu:16.04"
+      image: "ubuntu:18.04"
 
       features:
         taskclusterProxy: true
@@ -45,7 +45,7 @@ tasks:
         - "--login"
         - "-cxe"
         - >
-          echo "deb http://archive.ubuntu.com/ubuntu/ xenial-updates main" > /etc/apt/sources.list.d/xenial-updates.list &&
+          echo "deb http://archive.ubuntu.com/ubuntu/ bionic-updates main" > /etc/apt/sources.list.d/bionic-updates.list &&
           apt-get -qq update && apt-get -qq -y install git python3-pip curl sudo &&
           adduser --system --home /home/build-user build-user &&
           cd /home/build-user/ &&