Limit CMake search for RootTestDriver.cmake
Limit CMake search for RootTestDriver.cmake

We currently search for the RootTestDriver.cmake on the whole
system, which could lead to some very funny behaviour if we
pick up the wrong file. Especially since the given paths to
this search function are not the first paths that CMake will
search.

karies/root,olifre/root,root-mirror/root,karies/root,olifre/root,karies/root,root-mirror/root,karies/root,karies/root,root-mirror/root,zzxuanyuan/root,zzxuanyuan/root,karies/root,zzxuanyuan/root,zzxuanyuan/root,olifre/root,karies/root,olifre/root,karies/root,zzxuanyuan/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,karies/root,root-mirror/root,karies/root,olifre/root,zzxuanyuan/root,zzxuanyuan/root,zzxuanyuan/root,zzxuanyuan/root,root-mirror/root,karies/root,olifre/root,zzxuanyuan/root,olifre/root,root-mirror/root,root-mirror/root,zzxuanyuan/root,root-mirror/root,zzxuanyuan/root,root-mirror/root,olifre/root,olifre/root