Fix e2e egress httpbin.org tests (#5637)
Fix e2e egress httpbin.org tests (#5637)

* Fix pilot e2e tests to match httpbin.org's new format

* Make lint happy

* Match case-insensitive

smawson/istio,frankbu/istio,frankbu/istio,smawson/istio,istio/istio,geeknoid/istio,frankbu/istio,geeknoid/istio,geeknoid/istio,istio/istio,geeknoid/istio,smawson/istio,frankbu/istio,geeknoid/istio,istio/istio,istio/istio,istio/istio,frankbu/istio,smawson/istio,smawson/istio,smawson/istio,geeknoid/istio,frankbu/istio