Set default log level to stdout

What does this MR do?

This sets the default log level for logsrus to be stdout instead of stderr as noted in the logsrus readme.

Why was this MR needed?

Using gitlab-runner in scripts was failing due to things being sent to stderr

What's the best way to test this MR?

./gitlab-runner verify 2>error.txt error.txt should be empty

What are the relevant issue numbers?

#4390