Add a wsgi middleware for handling https behind a reverse proxy.

The HTTP header X-Scheme can be set for override the scheme use by
jormungandr
Enabe the passing of headers to que query in integration tests

Add a kwargs parameter on the query function of integration test
framework, this way we can pass headers in the query
Add test for the ReserseProxied middleware
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check if the scheme is one of http or https
Merge pull request #387 from kinnou02/force_https

Add a wsgi middleware for handling https behind a reverse proxy.