Don't use get_resource_path from traits

[aaronayres35]

See comment: enthought/traits#1424 (comment)

• get_resource_path
  This uses evil magic and its use should be avoided if at all possible. Pyface should find a better way of doing whatever it's doing. It's not used within Traits anywhere, and it's not tested anywhere."

Uses are:

pyface/pyface/ui_traits.py

Line 29 in 2974f58

from traits.trait_base import get_resource_path

pyface/pyface/image/image.py

Line 62 in 2974f58

from traits.trait_base import get_resource_path, traits_home

pyface/pyface/resource/resource_path.py

Line 19 in 2974f58

from traits.trait_base import get_resource_path