GrizzlyResponse#getResponseBodyAsBytes doesn't return original content.
Merge pull request #335 from kumai/fix/grizzly_response_as_bytes

GrizzlyResponse#getResponseBodyAsBytes should return original byte array (backporting from master)
Add constructor to allow decoupling of the AHC config.
Quick fix to secure check.
DelayedExecutor has to be public in order to use new GrizzlyConnectionsPool contructor