* enable TestCongtainer for E2E test for (singleNode and cluster)

* remove duplicated operations in integration-test phase

* move spotless:apply to a profile `spotless`, which is enabled by default.
Co-authored-by: Nxiangdong huang <sainthxd@gmail.com>

* seperate thrift module into 3 parts; extract Node Serialization from Server module into Cluster module
* add instruction for the ordering of imports
* add snappy into service-rpc pom
* modify readme of the whole project
* add logback and slf4j in root/pom

[CLIENT-PY] Fixed print statements with logging output. Added Exceptions instead of empty returns (#2968)

* [CLIENT-PY] Fixed print statements with logging output. Added Exceptions instead of empty returns.
[CLIENT-PY] Applied flake8 and black for reformatting.
[CLIENT-PY] Added release script to do a pypi release.
[CLIENT-PY] Improved Release Documentation.

Co-authored-by: Ne <876670773@qq.com>
Co-authored-by: Nxiangdong huang <sainthxd@gmail.com>

refactor CI by split a CI into several parts, fix code-coverage and extract jar-with-dependencies (#2603)

* split `jar-with-dependencies` into an individual Profile.
* add code-coverage module
* support jdk15

[IOTDB-507] Add zeppelin-interpreter module  (#2096)
Co-authored-by: NXiangdong Huang <hxdreg@qq.com>
Co-authored-by: NJialin Qiao <qjl16@mails.tsinghua.edu.cn>
Co-authored-by: Nkr11 <3095717866@qq.com>
Co-authored-by: kr11 <3095717866.com>

Co-authored-by: NHouliangQi <neuyilan@163.com>
Co-authored-by: Nwangyanhong <1101967410@qq.com>
Co-authored-by: Nchaow <runhuster@foxmail.com>
Co-authored-by: NJiang Tian <jt2594838@163.com>
Co-authored-by: Nchaow <xunmengzhuiyi@gmail.com>
Co-authored-by: NLebronAl <TXYPotato@gmail.com>
Co-authored-by: NRing-k <yuyuankang@hotmail.com>
Co-authored-by: Nxiangdong huang <sainthxd@gmail.com>

* update how to compile the site
* upgrade version to v0.12
* remove download links of legacy versions, add -c parameter for cli in doc

* refactor python client structure
Co-authored-by: N151250176 <151250176@smail.nju.edu.cn>
Co-authored-by: Nxiangdong huang <sainthxd@gmail.com>
Co-authored-by: NJulian Feinauer <j.feinauer@pragmaticminds.de>

* force claim guava version to avoid version conflict in hadoop and spark module

- Made the source plugin create source-jars even for SNAPSHOT builds

* - Made it possible to load the config from the classpath

Add C++ Client
Co-authored-by: NShao <shao@MacBook-Pro.local>
Co-authored-by: Nxiangdong huang <sainthxd@gmail.com>

* add release note for v0.10.1
* fix some maven warn;
Co-authored-by: Nxiangdong huang <sainthxd@gmail.com>