* update asynchttpclient verison

* add default config for new version of asynchttp

* update license version

* fix ut

* add default config for asynchttp to avoid npe

Currently, many modules depend on `managed-ledger-test.jar` just because they want to use MockBookkeeper and MockZookeeper.  This made module dependencies hard to understand and track.

This PR introduces a new `testmocks` module and pulls all mocks from managed-ledger tests into the new module.

### Motivation
The removed test libraries were already defined in the parent pom

### Modification
Removed duplicated test libraries in POM dependencies

*Motivation*

Bump the development version to 2.6.0-SNAPSHOT

* Removed managed-ledger-shaded artifact

* Fixed dep artifact renaming error

* adding a module that shades managed-ledger

* removing commented out lines

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

* Move pulsar functions dependency version to root pom and remove duplicated license headers

This addresses some comments in pulsar functions PR #1314

* shade worker

* Fix broken master

* Upgrade the bookkeeper storage client dependency to the official bookkeeper version

This removes the temp dependency in `pulsar-functions-instance`

* set `protobuf2.version` in pulsar-common

* provide a shaded worker

* include worker dependency at broker

* Embeded function worker at broker

* rename 'function worker' to 'functions worker'

* add "--no-functions-worker" for pulsar-client-cpp tests

* Updates headers with ASF source files header

* change license to additional files