Warnings when loading .tif files pulled in from pr2_description

[Kukanani]

When loading the PR2 gripper images, I get warnings related to the TIFF format. The warnings appear to be the same as the ones in this issue but I thought I would report it here, since fixing it there won't fix it here without a re-copy.

[DLu]

What release do you see these issues with?

[DLu]

This issue affects xenial/kinetic. Reported upstream here: ros-visualization/rviz#1201