CTest: exclude /showIncludes notes when scraping logs

My last related commit e5e3f3d4 (CTest: filter /showIncludes output from
ninja compile launcher, 2013-12-01) filtered /showIncludes messages from
the generated xml output but they also need to be filtered in
ScrapeLog().  Otherwise they are being detected as warnings when using
compilers withs english diagnostics.
Help: List the whitelist of properties for INTERFACE libraries.
Merge branch 'fix-showinclude-warnings' into release
Merge branch 'INTERFACE-property-docs' into release
find_dependency: use correct version variable name

The code set cmake_fd_version, but used ${version}.
find_dependency: unset cmake_fd_version variable at end of macro

This matches the other macro variables.
Merge branch 'fix-find_dependency-macro' into release