add melodic travis test

[knorth55]

.travis.rosintall.melodic

• Baxter repos: https://discourse.ros.org/t/baxter-release-permissions/8705
• app_manager: Release request: 1.1.1 PR2/app_manager#12
• pepper_robot: Melodic release ros-naoqi/pepper_robot#50
• naoqi_bridge: Release request for melodic ros-naoqi/naoqi_bridge#94
• pr2_robot: Release request for melodic PR2/pr2_robot#261

[k-okada]

ROS_DISTRO=melodic USE_DEB=false
failing on https://travis-ci.org/github/jsk-ros-pkg/jsk_robot/jobs/674313863 ?

baxtereus/test_results/baxtereus/rostest-test_baxter-moveit.xml: 1 tests
baxtereus/test_results/baxtereus/rostest-test_test-baxter.xml: 1 tests
baxtereus/test_results/baxtereus/rosunit-baxter_lisp.xml: 10 tests
baxtereus/test_results/baxtereus/rosunit-baxter_moveit_test.xml: 7 tests
fetcheus/test_results/fetcheus/rostest-test_fetch-moveit.xml: 1 tests
fetcheus/test_results/fetcheus/rostest-test_fetcheus.xml: 1 tests
fetcheus/test_results/fetcheus/rosunit-fetch_moveit_test.xml: 3 tests
fetcheus/test_results/fetcheus/rosunit-fetcheus_test.xml: 5 tests
jsk_aero_startup/test_results/jsk_aero_startup/roslaunch-check_test_aero.test.xml.xml: 1 tests
jsk_fetch_startup/test_results/jsk_fetch_startup/roslaunch-check_fetch_bringup__launch_teleop_false.launch.xml: 1 tests, 0 errors, 1 failures, 0 skipped
jsk_fetch_startup/test_results/jsk_fetch_startup/roslaunch-check_launch_fetch_gazebo_bringup.launch.xml: 1 tests, 0 errors, 1 failures, 0 skipped
jsk_fetch_startup/test_results/jsk_fetch_startup/roslaunch-check_launch_rviz.launch.xml: 1 tests
jsk_pepper_startup/test_results/jsk_pepper_startup/MISSING-roslaunch-check_jsk_pepper_startup__ROS_IP_10.68.0.2 NAO_IP_10.68.0.3 launch_dashboard_false.launch.xml: 1 tests, 0 errors, 1 failures, 0 skipped
jsk_robot_utils/test_results/jsk_robot_utils/rostest-test_angle_vector_compress.xml: 1 tests
jsk_robot_utils/test_results/jsk_robot_utils/rostest-test_joint_state_compressor.xml: 1 tests
jsk_robot_utils/test_results/jsk_robot_utils/rosunit-angle_vector_compress_error_test.xml: 1 tests
jsk_robot_utils/test_results/jsk_robot_utils/rosunit-angle_vector_compress_test.xml: 1 tests
pr2_base_trajectory_action/test_results/pr2_base_trajectory_action/gtest-spline_test.xml: 2 tests
Summary: 40 tests, 0 errors, 3 failures, 0 skipped

[knorth55]

test passed!