[1.7.x] Fixed a staticfiles test on Windows.
[1.7.x] Fixed a staticfiles test on Windows.

Backport of 9980f67154 from master

oscaro/django,jyotsna1820/django,oscaro/django,jyotsna1820/django,oscaro/django,oscaro/django,jyotsna1820/django,jyotsna1820/django