update travis.yml, add kinetic and melodic checks

Author: fmessmer

.travis.yml

@@ -1,18 +1,23 @@
-sudo: required 
-dist: trusty 
 language: generic
+services:
+  - docker
+
 notifications:
   email:
     on_success: change
     on_failure: always
 env:
   global:
-    - ROS_DISTRO="indigo"
-    - UPSTREAM_WORKSPACE=file
-    - ROSINSTALL_FILENAME=.travis.rosinstall
+    - ROS_REPO=ros
   matrix:
-    - ROS_REPOSITORY_PATH=http://packages.ros.org/ros/ubuntu
+    - ROS_DISTRO=indigo UPSTREAM_WORKSPACE=file
+    - ROS_DISTRO=indigo UPSTREAM_WORKSPACE=debian
+    - ROS_DISTRO=kinetic UPSTREAM_WORKSPACE=file
+    - ROS_DISTRO=kinetic UPSTREAM_WORKSPACE=debian
+    - ROS_DISTRO=melodic UPSTREAM_WORKSPACE=file
+    - ROS_DISTRO=melodic UPSTREAM_WORKSPACE=debian
 install:
   - git clone https://github.com/ros-industrial/industrial_ci.git .ci_config
-script: .ci_config/travis.sh
-#  - source ./travis.sh  # Enable this when you have a package-local script 
+script:
+  - .ci_config/travis.sh
+#  - ./travis.sh  # Enable this when you have a package-local script