Logging System

[matejicko]

To make this application as much customizable as possible, there will be one generally-accessible instance of ILogger (from Microsoft.Extensions.Logging), which can be dynamically switched during run-time. By default, Serilog instance of their ILogger will be used. Since, their logger class doesn't implement Microsoft's interface ILogger, there has to be adapter SerilogLoggerAdapter.

Logging levels works as follows:

• Error - if the exception was thrown, user will know about that via error logs.
• Warning - user is warned about potential threats and/or his bad practices.
• Information - user is informed about execution of logical units - e.g. start of whole process, execution of test cases...
• Debug - information about pipelines and their steps executions are captured on this level.
• Trace/Verbose - the most detailed logging. Each small process or even sub-process is documented here.

User will be normally informed about Error, Warning and Information levels, if not specified differently.

[matejicko]

Add test case name for logs. Don't put it there as a part of message, but as some category or something like that.