Previously, parmetis flags were not added as we used PARMETIS_COMPILE_FLAGS
which does not exist. This patch now sets the properties COMPILE_DEFINITIONS
and INCLUDE_DIRECTORIES for the targets and uses the correct values.

Find<Package>.cmake modules, as they were missing with set
CMAKE_DISABLE_<Package>=TRUE.

Now they are in speparte modules Add<Package>Flags and thus can be
used as exspected with disabled packages.

[[Imported from SVN: r7463]]