WS-952: added ability to cancel capabilities

...ents/request-operations/request-operations.component.html

...onents/request-operations/request-operations.component.ts

...uest/components/status-badges/status-badge.component.html

...ility-request/components/versions/versions.component.html

...src/app/workspaces/services/capability-request.service.ts

services/capability/capability/routes.py

services/capability/capability/server.py

services/capability/capability/views/capability_version.py

services/capability/test/test_capability_routes.py

shared/workspaces/test/test_req_state_setter.py

shared/workspaces/workspaces/capability/enums.py

shared/workspaces/workspaces/capability/message_architect.py

shared/workspaces/workspaces/capability/schema.py

...kspaces/workspaces/capability/services/capability_info.py

...aces/workspaces/capability/services/capability_service.py

...paces/workspaces/capability/services/execution_manager.py

...aces/workspaces/capability/services/restriction_engine.py

.../workspaces/workspaces/capability/state_machine_schema.py