[Test Suite] Improving logging

All logs should follow the same template and indicate the type of the log at the beginning. It is also better if the error numbers started from 1 rather than 0. Here is a suggestion:

%(type) %(number): %(message)
Input: <%(input)>
Action: %(action)
Details: %(details)
<newline>
The type can be warning or error

If the error was an exception that can't be linked to a specific action or image then the format can become:
%(type) %(number): %(message)
Details: %(details)

We should consider using the logging module