Update jsk_travis to 0.5.6

[YutoUchimi]

No description provided.

[knorth55]

@YutoUchimi do you know the reason why current Travis CI build is failing?

[pazeshun]

It seems that current indigo test (ROS_DISTRO=indigo USE_DEB=false EXTRA_DEB="ros-indigo-convex-decomposition ros-indigo-ivcon") takes too much time.

I compared results of that test in this PR and #1173.

	This PR	#1173
Whole test time	48 min 37 sec	More than 50 min (Timeout)
rosdep_install	16 min 40 sec	16 min 51 sec
catkin_build	13 min 44 sec	14 min 15 sec
catkin_run_tests	10 min 52 sec	? (Timeout)

We can do...

• Change cache settings to speed up rosdep install
  • Current settings doesn't seem to have apt-cacher-ng setting
  • But this solution works in each test after that test succeeds once
• Increase CATKIN_PARALLEL_JOBS or ROS_PARALLEL_JOBS to speed up catkin build
  • But this sometimes makes build unstable
• Split test packages like Split TEST_PKGS into [pr2eus] and [pr2eus_moveit, pr2eus_tutorials] jsk_pr2eus#417

[YutoUchimi]

The main purpose of this PR is to upload cache correctly.
jsk_travis 0.5.5 and upper exits from docker container successfully, so caches specified in .travis.yml will be uploaded to server.
You can check uploaded cache of this repository by: https://travis-ci.org/jsk-ros-pkg/jsk_robot/caches?utm_medium=notification&utm_source=github_status

[pazeshun]

In catkin_run_tests...

Finished <<< aeroeus                                   [ 0.1 seconds ]
Finished <<< fetcheus                                  [ 1 minute and 42.6 seconds ]
Finished <<< jsk_baxter_web                            [ 0.2 seconds ]
Finished <<< jsk_fetch_diagnosis                       [ 0.1 seconds ]
Finished <<< jsk_pr2_calibration                       [ 0.1 seconds ]
Finished <<< jsk_robot_startup                         [ 0.2 seconds ]
Finished <<< jsk_robot_utils                           [ 18.6 seconds ]
Finished <<< naoqieus                                  [ 8.7 seconds ]
Finished <<< pr2_base_trajectory_action                [ 5.7 seconds ]
Finished <<< roseus_remote                             [ 0.2 seconds ]
Finished <<< jsk_baxter_startup                        [ 0.1 seconds ]
Finished <<< jsk_aero_startup                          [ 1.5 seconds ]
Finished <<< jsk_fetch_startup                         [ 5.2 seconds ]
Finished <<< jsk_pepper_startup                        [ 1.5 seconds ]
Finished <<< jsk_nao_startup                           [ 0.3 seconds ]
Finished <<< naoeus                                    [ 4.6 seconds ]
Finished <<< peppereus                                 [ 0.2 seconds ]
Finished <<< jsk_pr2_startup                           [ 0.2 seconds ]
Finished <<< baxtereus                                 [ 8 minutes and 20.0 seconds ]

baxtereus seems too heavy... I'll find what we can reduce.
-> baxter-moveit-nogui.test takes about 4 min and test-baxter.test takes about 4 min. failed for normal ik, try to move arms very slowly makes euslisp test slow, but IK fails without that.

[pazeshun]

Building some packages in jsk_3rdparty is slow:

Finished <<< downward                                  [ 5 minutes and 40.7 seconds ]
Finished <<< assimp_devel                              [ 7 minutes and 14.2 seconds ]

[pazeshun]

@YutoUchimi @knorth55 I created #1177 and #1179 to reduce travis test time.
Both seem effective.