versioncontrol_git 7.x-1.0-rc3

Changes since 7.x-1.0-rc2:

• #2899134 by drumm: Uses PDO::FETCH_ASSOC in VersioncontrolGitEventController::attachExtendedEventData()
• #2892229: Logs git version on test respository creation check.
• #2763461 by drumm: Allow querying on versioncontrol_git_operations properties
• Implement label support on cgit repository webviewer url handlers' repository url.
• Update long outdated readme file.
• Use revision as the hash used on the item view url for cgit.
• Minor doc fix.
• #2226443: Support empty-message annotated tags.
• Separate commit diff operation to improve code reading.
• #2226443: Pass repo_id instead of the full repository on VersioncontrolGitRepository::setDefaultBranch().
• #2226443: Direct query for current commits on full repository sync.
• #2093427: Work-around git-symbolic-ref behavior on pre-initial-commit repositories.
• #2093427: Do not try to fetch a default branch on an invalid repository.
• #2093427: Re-schedule default branch update for invalid branches.
• #2210595: Makes VersioncontrolGitRepositoryHistorySynchronizerDefault::getCommitInterval() public.