Extend test.sh

[mszulcz-mitre]

The script opencbdc-tx/scripts/test.sh runs integration and unit tests and measures test coverage. It has a few limitations:

• It must be run from the top-level folder in the repo (opencbdc-tx/).
• It assumes the build directory is called build and is located in the top-level folder of the repo (i.e. opencbdc-tx/build).
• It always runs unit and integration tests and measures coverage.

I think it could be improved by:

• Allowing the user to run it from any folder.
• Allowing the user the option of defining the build folder as a command-line argument.
• Allowing the user to choose via command-line arguments which tests to run (e.g. unit tests, integration tests, or both) and whether to measure coverage.

I think these changes can be made easily and can preserve backward compatibility (e.g. running the modified script with no command-line arguments would do what the script currently does).