BZ 1065438: apply umask in setPermission
Revert "BZ 1065438: apply umask in setPermission"

This reverts commit 961c13d402c4812fd6cbfd51f81ae60284eff482.
BZ 1065438: apply umask in mkdirs
use relative path in umask unit test
Merge pull request #92 from rootfs/master

BZ 1065438: apply umask in setPermission