Http Mock Server & Http Callback Assertions

**Gerard Dougan** ([Bug 52199](https://bz.apache.org/bugzilla//show_bug.cgi?id=52199&redirect=false)):
Add the ability to specify a HTTP mock server, providing canned responses to predefined request types.
Add the ability to provide assertions predicated on a HTTP callback e.g. in the case where the system being tested should send the caller a delivery receipt.

Attached is a full eclipse project zip containing all source files for the aforementioned features. The source depends on the Java 6 com.sun.net.httpserver package as the method for exposing mock server and callback facilities.

The project also contains a MockServerSample.jmx file which illustrates usage of the mock server component.

Thanks
Gerard

Created attachment [http-plugins.zip](https://apache.github.io/jmeter-bugzilla-attachments/99/52199/27957/http-plugins.zip): source files

OS: All