Added DUM + its tests to CMake build.


git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-cmake-experiment@10882 ddefafc4-47db-0310-ae44-fa13212b10f2
Fixed issue when popt is not present on system

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/branches/b-cmake-experiment@10883 ddefafc4-47db-0310-ae44-fa13212b10f2