[LUCENE-8169] Migrate build to use OpenClover 4.2.1

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.3, 8.0
• Component/s: general/build
• Labels: clover
• Lucene Fields: New
• Assignee: Uwe Schindler
• Reporter: Uwe Schindler
• Created: 11/Feb/18 00:03
• Updated: 28/Aug/22 15:25
• Resolved: 11/Feb/18 09:53

Description

Last year, Atlassian opensourced Clover and stopped releasing new versions. Latest supported version is 4.1.2: https://www.atlassian.com/blog/announcements/atlassian-clover-open-source

After opensourcing it was foked and OpenClover was founded: http://openclover.org/

The latest OpenClover version is 4.2.1.

This will issue will migrate to the opensourced OpenClover 4.2.1 version (also in preparation for Java 9). It will mainly remove the license file and cleans up the build to no longer refer to it.