* use .yaml instead of .yml
This is recommended by Symfony standards
* save Bundle files also to src path
* add test for generate ping
* add package imports
* fix expected file names
* why is Api/ApiServer.php missing
* output filenames
* use getAbsolutePath for debug purpose
* do not use punctuation as current directory
* refactor: remove todos
* use also .yaml in test to fix it
* add test for setting a different source directory
* use correct const for setting source dir property in tests
* import the AbstractPhpCodegen in test class
* put also Resources to source path
* save docs not to Resources
* update samples and improve src path in autoload.php and composer.json
* update moved samples
* Removed commented code
* Input validation is now supported as strict JSON validation
* [PHP][Symfony] Improve the implementation
Closes#6614
* Generated code is tested to assure it compiles and updated README to dynamically load dependencies via composer
* Updated shell script because shippable tests were failing
