Rename the Application_Impl class to DummyApplication
Rename the Application_Impl class to DummyApplication

Application_Impl is a misleading name, sounds much too important, as if it was
*the* implementation of Application, used in all cases, which is not the
case.

Change-Id: I61ab7261598029429d3c745a8409400025dc4a9a

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core