Bug report

Bug summary
When plotting using a hatch, alpha is not applied to the hatching

Code for reproduction

import matplotlib.pyplot as plt
plt.fill_between(range(10), [10]*10, hatch='/', alpha=0.5)
plt.show()

Actual outcome
Hatching is black with no alpha

Expected outcome
Before matplotlib 2.0, the hatching was the color of the fill and alpha was respected

Matplotlib version

Windows 7
matplotlib 2.0.0
numpy 1.12.0
scipy 0.18.1
Installation through pip