[Wait for upstream] [jsk_pr2_startup, jsk_fetch_startup] use app_manager as plugin

[knorth55]

split from #1081
load apps as plugin
cc. @furushchev

[k-okada]

@708yamaguchi please check on Fetch robot

[knorth55]

@708yamaguchi @k-okada I tested with fetch15 and it works.

fetch@fetch15:~/ros/indigo/src/jsk-ros-pkg/jsk_robot/jsk_fetch_robot/jsk_fetch_startup$ rospack plugins --attrib=app_dir app_manager
jsk_fetch_startup /home/fetch/ros/indigo/src/jsk-ros-pkg/jsk_robot/jsk_fetch_robot/jsk_fetch_startup/apps
jsk_pr2_startup /home/fetch/ros/indigo/src/jsk-ros-pkg/jsk_robot/jsk_pr2_robot/jsk_pr2_startup/apps

/var/log/upstart/jsk-fetch-startup.log

[INFO] [WallTime: 1558612901.923929] Client connected.  1 clients total.
[INFO] [WallTime: 1558612902.273419] [Client 0] Subscribed to /fetch15/app_list
[INFO] [WallTime: 1558612911.194977] start_app: jsk_fetch_startup/hello_world
[INFO] [WallTime: 1558612911.195209] Loading app: jsk_fetch_startup/hello_world
[INFO] [WallTime: 1558612912.072172] Launching: /home/fetch/ros/indigo/src/jsk-ros-pkg/jsk_robot/jsk_fetch_robot/jsk_fetch_startup/apps/hello_world/hello_world.xml
started roslaunch server http://fetch15:55140/

SUMMARY
========

PARAMETERS
 * /rosdistro: indigo
 * /rosversion: 1.11.21

NODES
  /
    run_hello_world (jsk_fetch_startup/boot_sound.py)

ROS_MASTER_URI=http://localhost:11311
core service [/rosout] found
process[run_hello_world-1]: started with pid [13437]
[INFO] [WallTime: 1558612912.522123] Waiting for foreign master [http://localhost:11313] to come up...
[INFO] [WallTime: 1558612912.523723] Foreign master is available
[run_hello_world-1] process has finished cleanly
log file: /home/fetch/.ros/log/6a608bf8-7d52-11e9-a43b-d8cb8a40210c/run_hello_world-1*.log
all processes on machine have died, roslaunch will exit
[INFO] [WallTime: 1558612926.165813] handle stop app: stopping app [jsk_fetch_startup/hello_world]
[INFO] [WallTime: 1558612926.545750] handle stop app: app [jsk_fetch_startup/hello_world] stopped

[708yamaguchi]

I also tested app_manager with knorth55/app-manager branch.

I did hello world app on real Fetch robot.

[knorth55]

Test failed because app_manager 1.1.1 is not released in both kinetic and melodic.
I made a release request 1.1.1 in app_manager.
However, we need to install app_manger by source because inddigo which runs in PR2 and fetch is EOL.
PR2/app_manager#12

[knorth55]

We need this release for build passing.
PR2/app_manager#12