Fix default mode warning in io.resize_image

[developius]

Signed-off-by: Finnian Anderson get@finnian.io

This fixes a warning in io.resize_image which originates in skimage.transform.resize.
The default mode for resize will change from constant to reflect, so this commit changes the call to resize so that it passes mode manually.
Warning:

.../python2.7/site-packages/skimage/transform/_warps.py:84: UserWarning: The default mode, 'constant', will be changed to 'reflect' in skimage 0.15.

Fixes #5602

[developius]

Not sure why this test is failing, the code change shouldn't have been a breaking change.

[Noiredd]

I have restarted the tests that failed prior to #5973, it passes now.

Indeed, skimage.transform.resize used to have a default argument mode='constant' which will change to None in future versions. Thank you for the fix!

[alexellis]

Nice one @developius 👍 Caffe is awesome..