Update Travis CI configs.

-use a more recent Linux distribution.
-replace travis-ci.org with travis-ci.com in build badge reference.

.travis.yml

@@ -1,9 +1,13 @@
 languages: java
-# TODO: Add openjdk8 once it is available in Travis.
 jdk:
-  - oraclejdk8
-dist: trusty
-sudo: false
+  - openjdk8
+os: linux
+dist: xenial
+
+before_install:
+  - sudo apt update
+  - sudo apt install openjfx
+
 script: ./gradlew clean build --scan --no-daemon --info
 
 # see https://docs.travis-ci.com/user/languages/java/#Projects-Using-Gradle

README.md

@@ -1,6 +1,6 @@
 # Azkaban 
 
-[![Build Status](http://img.shields.io/travis/azkaban/azkaban.svg?style=flat)](https://travis-ci.org/azkaban/azkaban)[![codecov.io](https://codecov.io/github/azkaban/azkaban/branch/master/graph/badge.svg)](https://codecov.io/github/azkaban/azkaban)[![Join the chat at https://gitter.im/azkaban-workflow-engine/Lobby](https://badges.gitter.im/azkaban-workflow-engine/Lobby.svg)](https://gitter.im/azkaban-workflow-engine/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)[![Documentation Status](https://readthedocs.org/projects/azkaban/badge/?version=latest)](http://azkaban.readthedocs.org/en/latest/?badge=latest)
+[![Build Status](https://travis-ci.com/azkaban/azkaban.svg?branch=master)](https://travis-ci.com/azkaban/azkaban)[![codecov.io](https://codecov.io/github/azkaban/azkaban/branch/master/graph/badge.svg)](https://codecov.io/github/azkaban/azkaban)[![Join the chat at https://gitter.im/azkaban-workflow-engine/Lobby](https://badges.gitter.im/azkaban-workflow-engine/Lobby.svg)](https://gitter.im/azkaban-workflow-engine/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)[![Documentation Status](https://readthedocs.org/projects/azkaban/badge/?version=latest)](http://azkaban.readthedocs.org/en/latest/?badge=latest)
 
 
 ## Build

azkaban-web-server/package.json

@@ -1,7 +1,7 @@
 {
   "_comment": "This json is called by npm install",
   "name": "azkaban",
-  "description": "Azkaban 3 [![Build Status](http://img.shields.io/travis/azkaban/azkaban.svg?style=flat)](https://travis-ci.org/azkaban/azkaban) ========",
+  "description": "Azkaban 3 [![Build Status](https://travis-ci.com/azkaban/azkaban.svg?branch=master)](https://travis-ci.com/azkaban/azkaban) ========",
   "dependencies": {
     "chai": "3.5.0",
     "later": "1.2.0",