COMP: Remove code specific to CMake 2.8.7 in PackageAndUploadExtension script.

Since commit r21682, CMake 2.8.9 is required to build extensions.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21685 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: Remove debug statement introduced to help resolving issue 2491

Commit r21682 changed how parameter are passed to ctest script and, base
on the initial dashboard results, it most likely solved the problem.

Fixes #2491
See http://www.na-mic.org/Bug/view.php?id=2491

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21686 3bd1e089-480b-0410-8dfb-8563597acbee