The current code checks to see that the destination path shares a prefix
with os.path.curdir. However, os.path.curdir is set to the directory
containing the playbook, not the root of the workdir, which means we're
not excluding things in the trusted dir like we'd like to be doing.
We already set HOME to the root of thew workdir, so we can just switch
the check from os.path.curdir to os.path.expanduser('~') and achieve the
original intent.
Change-Id: Ifac41f74f3306fe74b522c910867f9a5375bd61e
950c6b1e2d