* Add property 'supportAsync' to allow the use of CompletionStage of java8
* Add support for completionStage in play-framework templates
* Add script to generate samples for play-framework async controllers
* Add generated samples for java play framework with asynchronous controllers
* Add missing templates and generate samples
* Remove useless comments from generated samples in play framework async
* Fix ControllerImp template for java play framework
* Add script for java play framework async to general script
* Regenerate java play framework server samples
* Fix missing whitespace
* Fix unnecessary blank lines at imports
* Fix tabulation issue
* Fix tabulation issue in controllers
* Remove blanks from api Imp
* Remove more empty lines
* Add blank between methods
* Remove blanks before call to service method
* Fix some tabulations in java play async templates
* Regenerate samples for java play async
