Revert "[INTERNAL] SimpleProxyServlet: fixed the handling of non 200 responses"

This reverts commit 0406f1b3eedca1a52cdb81920192e0a309adcb39.

Change-Id: I90382b14cd4c42da5f41dff7ce940fb41d38831b
Merge "Revert "[INTERNAL] SimpleProxyServlet: fixed the handling of non 200 responses""