[spoteus] Support kinematics-simulator for Spot

[tkmtnt7000]

This PR supports kinematics-simulator for Spot.

I fixed the wrong return value of (send self :simulation-modep) because Spot does not use follow_joint_trajectory.
cf: https://github.com/jsk-ros-pkg/jsk_pr2eus/blob/27066da325b7224bb35e3c4ded05b751c96fd907/pr2eus/robot-interface.l#L240-L251

cc:@708yamaguchi

[708yamaguchi]

Looks good to me.

One thing for more improvement.
From next time, you can separate the commit into functional change and code style change.

For example (https://github.com/sktometometo/jsk_robot/pull/129/files#diff-c70afdbf438eacc1424a31e609ab4e3d94460ba0d89d03df4004fef168731d56L50-R53 ),

(&rest args &key (trajectory-cmd-action-name "/spot/trajectory") (execute-behavior-action-name "/spot_behavior_manager_server/execute_behaviors"))

-> first commit (functional change commit) ->

(&rest args &key (trajectory-cmd-action-name "/spot/trajectory") (execute-behavior-action-name "/spot_behavior_manager_server/execute_behaviors") (simulation-mode nil))

-> second commit (style change commit) ->

   (&rest args
    &key (trajectory-cmd-action-name "/spot/trajectory")
         (execute-behavior-action-name "/spot_behavior_manager_server/execute_behaviors")
         (simulation-mode nil))

[tkmtnt7000]

@708yamaguchi
Thank you for advice.
I'll separate commits of code style change from next time.

[tkmtnt7000]

I forgot to mention that kinematics-simulator is not be displayed until jsk-ros-pkg/jsk_pr2eus#473 is merged.
So, if you want to use kinematics-simulator soon, you have to use jsk-ros-pkg/jsk_pr2eus@256b41e