Convert 'JiraAPI' to Java

[detunjiSamuel]

Description

Converted JiraAPI.groovy to JiraAPI.java as per the below issue.

Issue #3028

When modifying release permission

List the GitHub usernames of the users who should have commit permissions below:

• @username1
• @username2

This is needed in order to cut releases of the plugin or component.

If you are modifying the release permission of your plugin or component, fill out the following checklist:

Release permission checklist (for submitters)

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1. The usernames of the users added to the "developers" section in the .yml file are the same the users use to log in to [accounts.jenkins.io](https://accounts.jenkins.io/).

   The usernames of the users added to the "developers" section in the .yml file are the same the users use to log in to accounts.jenkins.io.
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2. All users added have logged in to [Artifactory](https://repo.jenkins-ci.org/) and [Jira](https://issues.jenkins.io/) once.

   All users added have logged in to Artifactory and Jira once.
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3. I have mentioned an [existing team member](https://github.com/orgs/jenkinsci/teams) of the plugin or component team to approve this request.

   I have mentioned an existing team member of the plugin or component team to approve this request.
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Add item to Release permission checklist (for submitters)

When enabling automated releases (cd: true)

Follow the documentation to ensure, your pull request is set up properly. Don't merge it yet.
In case of changes requested by the hosting team, an open PR facilitates future reviews, without derailing work across multiple PRs.

Link to the PR enabling CD in your plugin

CD checklist (for submitters)

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1. I have provided a link to the pull request in my plugin, which enables CD according to the documentation.

   I have provided a link to the pull request in my plugin, which enables CD according to the documentation.
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Add item to CD checklist (for submitters)

Reviewer checklist

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1. Check that the `$pluginId Developers` team has `Admin` permissions while granting the access.

   Check that the $pluginId Developers team has Admin permissions while granting the access.
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2. In the case of plugin adoption, ensure that the Jenkins Jira default assignee is either removed or changed to the new maintainer.

   In the case of plugin adoption, ensure that the Jenkins Jira default assignee is either removed or changed to the new maintainer.
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3. If security contacts are changed (this includes add/remove), ping the security officer (currently `@Wadeck`) in this pull request. If an email contact is changed, wait for approval from the security officer.

   If security contacts are changed (this includes add/remove), ping the security officer (currently @Wadeck) in this pull request. If an email contact is changed, wait for approval from the security officer.
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   • Toggle completion
   • Rename
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Add item to Reviewer checklist

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