Enhance "watch" command testing to verify that adapter gets restarted

In the watch mode of the dev-server the adapter files (e.g main.js/ts) is monitored for changes. If the file is changed ( maybe even a touch is enough?) and then the adapter to test is restarted.

Enhance the "watch" testing to include and validate this case. The log should show lines that the adapter is "terminating" and then started again.