0021308: Remove hard-coded dependency of the external mesh plugins from the SMESH...

0021308: Remove hard-coded dependency of the external mesh plugins from the SMESH module

  Store names of variables set via UpdateParameters() in myLastParameters field

-  void UpdateParameters(CORBA::Object_ptr theObject, const char* theParameters);
+  void UpdateParameters(/*CORBA::Object_ptr theObject,*/ const char* theParameters);

+  const std::vector< std::string >& GetLastParameters() const { return myLastParameters; }
+  std::vector< std::string >                               myLastParameters;