COMP: Except Git's status messages from CTest reporting

Git prints some of its normal status messages to stderr. This output can
be mistaken for warnings by CTest, particularly if the target Git
repository uses the word "warning" (for instance in a branch name).

This modifies the regex CTEST_CUSTOM_WARNING_EXCEPTION to also catch
and except the messages printed to stderr by "git clone" and
"git checkout" (to a detached HEAD), which occur when using Git to
fetch an ExternalModule.

A patch is also being submitted upstream to CMake to fix the same issue.

Change-Id: I7208bd811dd3a6c4f06a10ced5ef2caecaa30452
COMP: fix failing voronoi segmentation tests

Internal comp method used for std::sort didn't induce a strict weak
ordering ( <= vs < ) as required, since it returned true on
equal. This cause failures likely due to difference algorithms in
libc++.

Change-Id: Ic4c8f61d53bce6858b4edcd3a93c605271b0c65b
Merge topic 'FixVoronoiLibc++SortCmp'

b5dd8d4b COMP: fix failing voronoi segmentation tests
Merge topic 'DetachedHEAD-Warning2'

71d18597 COMP: Except Git's status messages from CTest reporting