ehyche 8067612e06 Handle when response is a file URL. (#6469)
This is the equivalent change in the swift4 module which was made in the swift3 module in this PR:

https://github.com/swagger-api/swagger-codegen/pull/6274

This updates AlamofireImplementations.mustache to handle when the response is an URL. It also makes changes in the generated sample code for:

* default configuration (no promisekit or rxswift)
* promisekit
* rxswift

Also, in order to build, the generated code needed to be updated with the change in CodableHelper which changes dataDecodingStrategy to ".base64" from its previous definition in earlier Xcode 9 betas.
*
2017-09-12 14:37:39 +08:00
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