Replacing existing bash and netcat based test HTTP server with a golang
implementation, to permit testing of connection limits. While desirable
to avoid introducing an additional testing dependency, employing golang
here solves several problems. The static linked binary works well with
CirrOS images for testing, since not other files need be included in the
CirrOS image. The implementation can scale to large number of
connections (5k in a m1.tiny instance, and in excess of the 20k limit
imposed by Apache Bench in a m1.large) and tracks the maximum number of
concurrent connections reached, this allows connection_limit testing.
Change-Id: Ib1320559142ca05177c5cb93f22baee401c17470
03cd2ec434