[TDF] Add pyunittests for cache
[TDF] Add pyunittests for cache

in combination with default columns too but keep test disabled until
the issue with Take is addressed.

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