Added stopsignal module with checkDependency and addStopSignal definitions

core/execution/action/action.py

@@ -1,5 +1,6 @@
 from core.apirequest import executeRequest
 from core.runtime.runtimecontract import buildRuntimeAttr, buildPreRuntimeAttr
+from core.runtime.stopsignals import addStopSignal
 
 
 def buildAction (action, outputs):
@@ -11,8 +12,6 @@ def buildAction (action, outputs):
             return outputs, None
 
     if match:
-        if hasattr(action, "depends"):
-            outputs["stopsignals"].append(action.alias)
         return outputs, None
     
     response, outputs = executeRequest(action, outputs, resolved)