* #676 added restartFromActivity server implementation
* #676: restart from activity - added client side implementation
* #676: renamed method to better reflect it's purpose
* #676: moved workflow test activity message status to enum
* #676: when workflow is executed, first activity is selected
* #676: moved workflow testing to a separate module
Co-authored-by: Sipke Schoorstra <sipkeschoorstra@outlook.com>
