* remove pulsar-client-schema

* shade avro dependencies in pulsar-client-kafka-shaded

* refactor api to separate module

* adding schema back

* cleaning up

* fix license issue

* fixing licenses

* cleaning up

* adding back lombok

* cleaning up

* [schema] enable Schema.AUTO if functions or connectors are using GenericRecord

* auto schema in jdbc sink

* [io] jdbc connector uses Schema.AUTO

* [schema] enable Schema.AUTO if functions or connectors are using GenericRecord

* add schema-api to functions-api

Signed-off-by: NSijie Guo <sijie@apache.org>

- Remove function-composition

* Relocate instance and spawner to be under `runtime` package
* fix the pom files and travis build

* Split functions module into api/runtime/api-examples

* Move `org.apache.pulsar.functions.api` package from runtime to api package

* Updates headers with ASF source files header

* change license to additional files