### Motivation

Currently, the Pulsar SQL CI test is blocked. 

### Modifications

1. Build a new docker image before CI test to make sure the latest changes are covered.
2. Remove the config `distributed-joins-enabled` in the `$PULSAR_HOME/conf/presto/config.properties`, this config was discarded in presto version `332`.
3. Add the config `-Dpresto-temporarily-allow-java8=true` in `$PULSAR_HOME/conf/presto/jvm.config`, this config is needed if use Java 8 environment.
4. The ClientBuilder will be loaded by two different ClassLoaders, in the Pulsar SQL CI test the ClientBuilder will be created by unexpected ClassLoader, we need to specify the ClassLoader for it.

### Motivation

Based on the scan results of `Black Duck`, we found that there are security vulnerabilities in the components currently used by pulsar, some are directly referenced by pulsar, and some are indirectly referenced by the pulsar.

* Upgrade Presto version to 332

* Update LICENSE file in pulsar-sql module

* Wrap ClassLoaderSafeConnectorMetadata around PulsarMetadata

* Update LICENSE file in pulsar-sql module

* Bumped version to 2.7.0-SNAPSHOT

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

### Modification
Removed duplicated test libraries in POM dependencies

* Switch ManagedLedger to use MetadataStore interface

* Use different thread for ZK callbacks

* Properly close metadata store in ml factory

* Fixed licenses

* Fixed problem in MockZookeeper

*Motivation*

Bump the development version to 2.6.0-SNAPSHOT

* Removed managed-ledger-shaded artifact

* Fixed dep artifact renaming error

* Adding offloader support for sql

* cleaning up

* cleaning up imports

* cleaning up configs

* fix imports

* fix behavior when offloader not configured and fix license

* fix unit test

### Motivation

Use Dsl json for  json deserialization is much faster

* more optimizations for sql

* cleaning up

* adding jctools dependency

* add jctools to license

* packaging presto with pulsar

* cleaning up distribution

* removing commented out lines

* cleaning up comments

* fix bug

* moving pulsar config dir

* adding missing header files

* add dependencies to license

* reorganizing project

* adding new presto distribution

* refactoring build and licenses

* remove commented out code

* addressing comments

* adding module for Pulsar SQL

* renaming presto pulsar package

* fixing pom and configs

* fixing pom

* using project version variable in pom

* adding comments