tasks/s3tests: push boto config with idle_timeout setting

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit 9d466aa110e293cb88c1f61cc7391d59b64b553b)
set boto timeout, too, for s3tests

Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit 9e5397237857d9015ac8c9e908f0cbeb1777576d)

Conflicts:

	machine_types/vps.yaml