* migrate mysql samples to oas 3.0
* update apache2 to use oas3 spec
* migrate graphql samples to use oas3 spec
* move avro script under bin
* update protobuf samples to use openapi3 spec
* add new files
* - Added Restbed Generator
* - Added Json processing functions to model
- Removed unnused code from restbed codegen class
- Added response header processing to api template
* Changed it to respect alphabetical order
* Made the string joining java 7 compatible
* Added samples
* Auto stash before merge of "master" and "origin/master"
* added missing apache2 config gen in services file
* - Added new Config Type
- Added Samples
- Added sample generating scripts
- Renamed Apache2Confgen to Apache2ConfigCodegen
* - Added Samples
- Added new config type
- Added sample generating scripts
- Renamed Apache2Confgen to Apache2ConfigCodegen