+ rename update_always to automatic_update as is should be

as only WorkflowTool is concerned and new property sheet can be completed
with properties other than constraints if needed.

work in progress

and rename a few others 'Default *' to 'Variable *'
and change Variable_getNonEvaluatedInitialValue to Variable_getNonEvaluatedVariableValue

regression in a2ce533c due to missing parenthesis in 'or' statement

default_value was a bad name due to existing get/setDefaultValue on Base class

and dynamic_varible to dynamic_variable

There was bad displaying and escaping on the list.

DynamicClassGeneration_resetDynamicDocuments interaction should be apply to _setTypeWorkflow... methods: resetDynamicDocumentsOnceAtTransactionBoundary method will be run when a transaction finishes (eg. self.commit() has been called).

needed for inheritance of testWorkflowMixin class

add workflow method to get transitions list and by id
  getTransitionValueList
  getTransitionValueById

change and rename method to return a dict
create new method to return state object for a given id

changes were also applied to DC workflow, which should not be changed

rename files my_default_expr.xml to my_default_expression.xml
rename default_expr to default_expression in xml files and scripts