Log tools command-line at higher log level (preferably default)

[gitfool]

I'm used to and prefer being able to see the command-line of all tools being run by default. This is also the behavior in TeamCity. Obviously subjective though.

References:

• ProcessRunner.cs#L63
• ProcessWrapper.cs#L61

[petriashev]

see my answer: https://stackoverflow.com/questions/50826394/how-to-print-tool-command-line-in-cake/50826495#50826495

[devlead]

Fixed by #2486