[CMake] Parse other module's dune.module to set variables for config.h

To set variables like DUNE_COMMON_REVISION the macro dune_module_information
is called. To surpress output the macro gets an additional second
argument to QUIET the output. To set the PACKAGE_* variables correctly
dune_module_information is called a second time for the current module
after it was called all the other modules.
[CMake] Use MPI_CXX_FOUND instead of deprecated MPI_FOUND.

MPI_FOUND is already deprecated in CMake 2.8.6 - our minimal
required version.