1.8.2+weblyzard.2

Further extend pull/merge request annotation handling (supersedes previous quick'n dirty issue comment filtering in previous patch).

Heavily inspired by https://github.com/mably/sonarqube-community-branch-plugin/tree/topic/new-configuration-options and backported to the 1.8 line to support Sonarqube 8.9

• Add separate "Community Branch Plugin" configuration section
• Allow filtering of issues by rule type and severity
• Limit number of added comments
• Delete resolved issues (instead of resolving) for leaner merge request discussion threads
• Reopen resolved issues if a Sonarqube issue reappears (or if filter settings are changed)
• Setting to disable pipeline status creation
• Setting to disable analysis summary comment
• Allow deletion of previous analysis summary comments (instead of resolving)

While these changes will lead to dead links (as comments and discussions are deleted), it helps a lot in maintaining a readable merge request discussion on Gitlab.