Testserver Coverage

[tjprescott]

Remaining testserver swaggers:

• httpInfrastructure HIGH PRIORITY
• media_types
• model-flattening (partially done)
• multiple-inheritance
• no-operations
• non-string-enum
• object-type
• parameter-flattening
• xml-service
• additionalProperties
• body-complex
• body-dictionary (PR Testserver tests for body-dictionary #293)
• body-duration
• body-formdata
• body-formdata-urlencoded
• complex-model