[ci/timeouts] partial exit on warning

[jbudz]

This is portion of a larger line by line type audit of our CI logs. We''ll go specific here for concrete reproduction steps. More to come under different themes (retry loops, closer look at what's reported in junit etc)

node scripts/functional_tests_server --config x-pack/test/api_integration/config.js

curl --user abc:bad_password "http://localhost:5620/api/stats?extended"

we get several not so cohesive issues:

1. long chain of unrelated requests start failing with authorization errors
2. state change that causes us to use apiKey instead of basic auth
3. setup_node_env sees a process warning and terminates proc [kibana]...
4. but the process manager stays active, including elasticsearch. exit 1 is trapped.
5. on the iffy side, is FORCE_COLOR erroring out in nontty? i can't find the server crashed with status code 1 message, i can find the leadup.

[elasticmachine]

Pinging @elastic/kibana-operations (Team:Operations)

[tylersmalley]

@spalger to reproduce