Merge pull request #956 from ddurnev/master

[RJA-2264][feature]: Added "Mark as Destroyed" menu item to instance details view
[RJA-2260][feature] - Running workflows: mocked REST to accelerate testing
[RJA-2260][feature] - Running workflows: mocked REST to accelerate testing
[RJA-2260][feature] - Running workflows: mocked REST to accelerate testing
Merge pull request #957 from rsvato/feature/rja-2200

[RJA-2260][feature] - Running workflows: mocked REST to accelerate testing
[RJA-2272][feature]: Modify DSL to support readonly attribute for workflow object