Added "-p" to mkdir cmds in a "set -e" script (/etc/rc.local).
/var/log/swift gets owned by the group "adm", but isn't group writeable
by default, so the find/rm in "resetswift" fails. So I added a chmod to
add group-write for that directory tree.
Added commands for installing tox.
Change-Id: Ic141491272a83a9233cd6a6a70c3ef74411f3f51