When run by hand, it's much easier to spot things going wrong when
they're colored in red. Add an ansible.cfg to make that happen. This
also sets a default output log file (``$ARTIFACTS/main.log``) - that
doesn't contain color-codes.
When executing against multple hosts, the output can sometimes become
difficult to read, esp. with lots of async. tasks. The callback_plugin
script reorganizes how the console and log is organized, making it
clearer which host did what and when.
Signed-off-by: Chris Evich <cevich@redhat.com>