* migrate all scala generators to use oas3
* add back pom.xml for scala-sttp
* skip form model in scalaz
* fix scala lagom tests
* add new files
* skip form models in scala finch petstore
* update samples
* [scala][akka-http-client] java8 dates support
* scala-akka readme doc updated
* DateSerializers renamed
* rename serializers
* move date-library option to abstractScala
* generators docs updated
* enum defined for date libraries
* Backport to scala-http-client
* fix scala-akka-client date serializers
* fix typo in docs
* switch scala templates to java8 (jsr-310) date library by default
* update scala samples with java8 date library
* update scala generators docs with java8 default date library
* fix scala-play-server generator cli options as only java8 dateLibrary supported
* fix scalaz DateTimeCodecs template to support java8
* scalaz ci test againt java7 removed as it generate scala 2.11.8 client which is java8 based