Committing proper testcase for bug 440823
Moving HttpTester to "tests" scoped jetty-http artifact.

 + HttpTester, a testing class, was used by jetty-servlets,
   embedded-jetty-examples, and test-integration, all from
   those testing scopes.  Moved the HttpTester into the
   pre-existing jetty-http "tests" classified artifact.
Improved exception reporting.
440729 - SSL requests often fail with EOFException or IllegalStateException.

Fixed IllegalStateException by handling NEED_UNWRAP for the CLOSED
state in fill().
The EOFException does not seem to be an issue with the client.

Also removed an unneeded catch block and an empty if statement.
Merged branch 'jetty-9.2.x' into 'master'.