Support for SSL in wsgi.Service

Enable support for SSL as well using code from glance. We
have some new options for configuring the SSL support.

test_app starts wsgi.Service with a test app, then creates
a url to make sure the http requests are actually served
properly

test_app_using_router adds wsgi.Router and Mapper() to the
mix along with using the wsgify annotation for serving
the http requests

Fixes LP# 979488 (partial)
Fixes LP# 869884 (partial)

DocImpact

Change-Id: Iae47b13b50e00c102c8c36f4a3e73b24fa4e6303
Merge "Support for SSL in wsgi.Service"