SUBMARINE-191. Add a script to ease merge PR without access browser

[tangzhankun]

What is this PR for?

Add a script to ease merge PR without access the browser.

What type of PR is it?

Improvement

What is the Jira issue?

https://issues.apache.org/jira/browse/SUBMARINE-191

How should this be tested?

For committer who has write access.
Usage:

git clone https://gitbox.apache.org/repos/asf/hadoop-submarine.git
cd hadoop-submarine
git remote rename origin apache
git remote add apache-github https://github.com/apache/hadoop-submarine.git
git config --local --add user.name {name}
git config --local --add user.email {username}@apache.org
echo -e "JIRA_USERNAME={jira_username}\nJIRA_PASSWORD={jira_password}" >> ~/.bashrc
source ~/.bashrc
dev-support/cicd/merge_submarine_pr.py

Questions:

• Does the licenses files need update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? Yes

[xunliu]

@tangzhankun
I suggest adding a description
First create a directory dedicated to merge, Execute those commands in this directory.
Avoid confusion with your own development directory.

[xunliu]

@tangzhankun , Using this script requires installing and deploying python2 natively and installing jira's python library, so I think in the future, consider providing a docker image for the committer to simplify this operation.

[tangzhankun]

@liuxunorg agree. Let's provide Dockerfile to easy these tools later.