[jsk_maps] Fix fetch_dock_position

[sktometometo]

Fix Fetch's docking station position wrongly changed by #1381.

[k-okada]

.github/workflows/config.yml / ros (noetic, jskrobotics/ros-ubuntu:20.04-pcl, python3-rospkg python3-rospkg-modules) (pull_request) Failing after 12m

The noetic test is expected to fail (that's why it does not 'required'), so if someone confirm this PR, then we're ready to merge.

Regarding the noteic test, see #1390

[sktometometo]

@mqcmd196 @Kanazawanaoaki @tkmtnt7000 Could you review this PR?

[mqcmd196]

Before the PR

After the PR

And the other spots are reasonable

[mqcmd196]

When checking on my local PC, #1361 was helpful.

[tkmtnt7000]

This is just a comment and I think this PR is OK.

I don't know why this change was made before, since there is no explanation in this code, but I assume that he wanted to define the location just before approaching the dock, rather than the position of the Fetch dock itself.
Perhaps, it may also be good to update this file and to set the Fetch dock position itself.
https://github.com/jsk-ros-pkg/jsk_robot/blob/f08427720dd2e467485aba4717d9779b87f3718e/jsk_fetch_robot/jsk_fetch_startup/scripts/correct_position.py#L21-L24

[knorth55]

FYI:
@tkmtnt7000 you are right.
i made the spot not for dock place, but for dock's approach position.
for that reason, i named it as dock-front.
but maybe i misused this spot in some program, probably.