fixed broken tests

Author: Andrei Neagu

services/director-v2/src/simcore_service_director_v2/models/dynamic_services_scheduler.py

@@ -406,7 +406,7 @@ def endpoint(self) -> AnyHttpUrl:
 
     paths_mapping: PathMappingsLabel  # overwrites in DynamicSidecarServiceLabels
 
-    is_collaborative: bool
+    is_collaborative: bool = False
 
     user_preferences_path: Path | None = None
     callbacks_mapping: Annotated[CallbacksMapping, Field(default_factory=dict)]