New dummycpp C++ job module (ported from dummypython).

settings.conf

src/modules/dummycpp/CMakeLists.txt

src/modules/dummycpp/DummyCppJob.cpp

src/modules/dummycpp/DummyCppJob.h

src/modules/dummycpp/dummycpp.conf

src/modules/dummycpp/module.desc