Add option for allowed console errors/messages

What problem do you want to solve?

The current console log and console error tests fail for any output. If there are cases of known an accepted output, this could be set to fail with warning, but this then requires a manual check of the results.

What is the proposed solution?

Add a new configuration option to be able to specify an array of allowed errors or log messages. This should allow exact strings or regular expressions. Allowed messages should not be logged in the results. If debug logging is implemented these should be included in the debug log.