resolve bug that prevents two equally seeded reference direction calculations (energy reduction method) to produce the same output

[NikHoh]

Test with:

---

import numpy as np

from pymoo.util.ref_dirs import get_reference_directions

a = get_reference_directions("energy", n_dim=3, n_points=100, seed=2)

b = get_reference_directions("energy", n_dim=3, n_points=100, seed=2)

print(np.array_equal(a, b))

---

Behavior before change:
Expected output: True
Given output: False

Behavior after change:
Expected output: True
Given output: True

[blankjul]

I am happy to merge the commit with the random seed directly. However, for the NSGA-III merge I would like to be a little more careful. Please see my comment in the review.