* [Java][retrofit2] Fix for issue #7446: file upload sets filename as baseName instead of a dynamic filename. The solution is to use okhttp3.MultipartBody.Part instead of RequestBody in formParams template.
* Changes corresponding to review comments
* Petstore Samples
* Fixed tests
* implemented core integration with play 2.4 ws
* added shell script to test on CI
* added shell script to composite file for all java generators
* added some comments
changed promise param to Response<T> to allow access to http status code and raw response if needed
* removed unnecessary whitespace changes
* added java7 compatibility, play ws deps to pom.xml
* added generated play24 client
* fixed imports