non-default-images: Strip whitespace in CSV

Signed-off-by: Chris Evich <cevich@redhat.com>
non-default-containers: Alert on unexpected containers

At the start of testing, and inbetween every test there is
no visibility into what containers have been left behind.
This new envcheck script filters any expected container
names/cids from those found running or stopped.

Signed-off-by: Chris Evich <cevich@redhat.com>
Merge pull request #402 from cevich/envcheck_update

Envcheck update