[CI] Update Travis conf: Remove EOLed distro. Add Melodic.

.travis.yml

@@ -18,20 +18,21 @@ env:
     - ROS_DISTRO="indigo" ROS_REPO=ros
     - ROS_DISTRO="indigo" ROS_REPO=ros-shadow-fixed
     - ROS_DISTRO="indigo" PRERELEASE=true
-    - ROS_DISTRO="jade"   ROS_REPO=ros
     - ROS_DISTRO="kinetic"   ROS_REPO=ros ABICHECK_URL='github:ros-drivers/openni2_camera#indigo-devel'
     - ROS_DISTRO="kinetic"   ROS_REPO=ros-shadow-fixed ABICHECK_URL='github:ros-drivers/openni2_camera#indigo-devel'
     - ROS_DISTRO="kinetic"   PRERELEASE=true
-    - ROS_DISTRO="lunar"   ROS_REPO=ros ABICHECK_URL='github:ros-drivers/openni2_camera#indigo-devel'
-    - ROS_DISTRO="lunar"   ROS_REPO=ros-shadow-fixed ABICHECK_URL='github:ros-drivers/openni2_camera#indigo-devel'
+    - ROS_DISTRO="lunar"   ROS_REPO=ros
+    - ROS_DISTRO="lunar"   ROS_REPO=ros-shadow-fixed
     - ROS_DISTRO="lunar"   PRERELEASE=true
+    - ROS_DISTRO="melodic"   ROS_REPO=ros ABICHECK_URL='github:ros-drivers/openni2_camera#indigo-devel'
+    - ROS_DISTRO="melodic"   ROS_REPO=ros-shadow-fixed ABICHECK_URL='github:ros-drivers/openni2_camera#indigo-devel'
+    - ROS_DISTRO="melodic"   PRERELEASE=true
 matrix:
   allow_failures:
     - env: ROS_DISTRO="indigo"  PRERELEASE=true  # Run docker-based ROS prerelease test http://wiki.ros.org/bloom/Tutorials/PrereleaseTest Because we might not want to run prerelease test for all PRs, it's omitted from pass-fail criteria.
-    - env: ROS_DISTRO="indigo" PRERELEASE=true
-    - env: ROS_DISTRO="jade"   ROS_REPO=ros
     - env: ROS_DISTRO="kinetic"   PRERELEASE=true
     - env: ROS_DISTRO="lunar"   PRERELEASE=true
+    - env: ROS_DISTRO="melodic"   PRERELEASE=true
 install:
   - git clone https://github.com/ros-industrial/industrial_ci.git .ci_config
 script: