Replace `inputs_complete` by `force_start_node` to forcefully mark nodes as start nodes

Fix #58 (closed)

Related to ewoksppf#16

doc/definitions.rst

@@ -151,8 +151,8 @@ Node attributes
         {
             "default_inputs": [{"name":"a", "value":1}]
         }
-* *inputs_complete* (optional): set to `True` when the default inputs cover all required inputs
-  (used for *method*, *script* and *notebook* as their required inputs are unknown)
+* *start_node* (optional): when set to `True`, the node will be explicitly defined as a start node i.e. a node that should be executed before all others.
+  (To be used as an escape hatch when the graph analysis fails to correctly assert the start nodes).
 * *conditions_else_value* (optional): value used in conditional links to indicate the *else* value (Default: `None`)
 * *default_error_node* (optional): when set to `True` all nodes without error handler will be linked to this node.
 * *default_error_attributes* (optional): when `default_error_node=True` this dictionary is used as attributes for the