Improve test experience - resolves #353

For the time being, we will be catching some verbose process logs coming from the browser during tests. Those messages are simply caught and filtered out from the output.

If someone will encounter any unnecessary messages that are still bugging him, we can add additional regex to solve the problem.
Here you are explicitly compiling a regular expression before using it, which can lead to slight performance improvements, but you are doing it every time rather than storing it permanently, so losing any gains that could have been had.