Add tests for Swift's StaticWeb middelware

Creates the tests in a new file and test 2 headers:
 + web-index
 + web-listings

blueprint test-swift-staticweb-middelware
Change-Id: Ib914ffe4b45b96276b4f1f20d3e9828d04958d14
Merge "Add tests for Swift's StaticWeb middelware"