Divide RestAction on two separated actions in DSL

 * in case MISTRAL_REST_ACTION we add Mistral-specific
   headers, in case REST_ACTION - we are not.
 * new class for this type of action is unnecessary,
   all of these are Rest, only properties can be edited
   in factories methods

Change-Id: I431e5009a531da6bea191e7253d43b4cd58c46fb
Merge "Divide RestAction on two separated actions in DSL"