* Add php_generic_services option
* Generate PHP generic services
* Respect namespaces for generated PHP services
* Test PHP generated services
* Rename PHP generator service method doc comment function
* Correct phpdoc service method case
* Test namespaced PHP generic services
* Always use the FQCN for PHP generic service input/output
* Add generated_service_test to php test.sh
* Add php service test protos to CI
* Add php service files to php_EXTRA_DIST
* Use Interface suffix for php generic services
