The color changes should only be done if you're using termcap or terminfo
to figure out what strings to use.  They don't work on the linux xterm I'm
using:

% sh run.sh glue
\e[0;1mS:glue:Mon Sep  4 14:39:16 PDT 2017
T:glue:1:A
A:System test glue
\e[0mI:testing that a ccTLD referral gets a full glue set from the root zone
I:testing that we don't find out-of-zone glue
I:exit status: 0
\e[0;32mR:PASS
\e[0m\e[0;1mE:glue:Mon Sep  4 14:39:17 PDT 2017

On systems that have tput, you can use that. I've pushed a change to the
branch for this.

At the moment I'm inclined to suggest we don't commit the color change at all,
and open a different ticket to discuss it further. I do like the idea of
color-coded test output, but it seems to me it would be even better if we
filtered the output from tests.sh, so "I:failed" could be highlighted
when it appeared.