esitag: Fix flaky test in TestResourceArgs_JSON
esitag: Fix flaky test in TestResourceArgs_JSON

because the underlying type might be a map which prints its entries
in an arbitrary order.

SchumacherFM/caddyesi,SchumacherFM/caddyesi,corestoreio/caddy-esi,corestoreio/caddy-esi,corestoreio/caddy-esi,SchumacherFM/caddyesi