Fix hardcoded Kompai topics

[pestefo]

Following topics: /kompai2/pose /kompai/scan

Are hardcoded. Check all of them and give consistent names according to the robot.

[pestefo]

I've just fixed. I will test it tomorrow in order to close it.

[pestefo]

Tested and it works for:

• /command_velocity
• /scan
• /pose
• /trajectory/differential

Not sure if we should have it also for:

• /orientation
• /initialpose

Closing this issue.