Fix: Hybrid A* direction is incorrect

[parmaski]

Reference issue

None

What does this implement/fix?

Hybrid A* outputs path containing x, y, yaw, and direction.
But direction is not preserved correctly and its size is smaller than x, y, yaw.

before fix

size of x, y, yaw, direction -> 1235, 1235, 1235, 510

after fix

size of x, y, yaw, direction -> 1235, 1235, 1235, 1235

• Red line: Path.direction_list=True (forward)
• Blue line: Path.direction_list=False (backward)

Additional information

hybrid_a_star.py throws module not found error because its dependency reeds_shepp_path_planning.py uses a module in root directory (utils/angle.py).
Therefore sys.path is also modified following other algorithms depending on utils/angle.py.

CheckList

• Did you add an unittest for your new example or defect fix?
• Did you add documents for your new example?
• All CIs are green? (You can check it after submitting)

[AtsushiSakai]

LGTM. Thanks!!